Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e07f6e2f17bd91e…

MALICIOUS

PDF

72.8 KB Created: 2021-09-04 17:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 83f1ab100e050c086e3e3b2ccbb20622 SHA-1: 9de1bcd72529125d40e2462a8e7d6b1569bb3c96 SHA-256: 3e07f6e2f17bd91e09f2c696e3e3337dd20f67712383fd333e9f31dadbe1c4ab
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external websites, many of which appear to be hosted on compromised WordPress installations or disposable domains. The high-risk heuristic 'PDF_RANDOM_URL_LINK' and the ML classifier's strong positive prediction indicate malicious intent. The file likely serves as a lure to direct users to malicious sites, potentially for phishing or to download further malware, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://wastran.ru/uplcv?utm_term=pdf+file+compressor+software+free PDF link annotation
    • https://aawyx.com/sites/default/imageuser/file/naxapalemamuxug.pdfIn PDF document text
    • http://kelvista.lt/images/files/95054654200.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160abb0c665294---25735503491.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/d4ae4840d8314f10100e644561609936/rorimamozawevafegoni.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/d84a846d9a8d78b157b51eecc905a52f/23683965498.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6ed91c0fa---pagek.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/c20f7acc1341758dd8106a6ea3dcc97d/72861860100.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/oa5pi237ntmqmv3lqsu20kbdh3/34446498660.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b37a2bb6bb1---bolarosojatizow.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/58154477244.pdfIn PDF document text
    • http://gat-asset.com/CKEdit/upload/files/nunalibukofoxogofevasanuz.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/tibizu.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/49712183955.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/72683157242.pdfIn PDF document text
    • https://bulgariapools.com/contents/files/xutonuzuxibuferoruwovuso.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/pcop2rjces35epmbi13gq57k3r/56546704800.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/s2jgdqt6qfsbf4fjcjqbmseee3/39573731268.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/25b1e956799299dfec826aa5bd6a6486/2638526532.pdfIn PDF document text
    • https://atesolve.com/ckfinder/userfiles/files/lasobijaj.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16130e8ff5e4e0---47434696082.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b1388d2ec94---zasikum.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1608aae0c1e432---67834232758.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/91191360515.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083ee26e1a1c---48197370802.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088177a8c0ea---73941430839.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bcfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCFB 15484 bytes
SHA-256: e9fcce41c088527f46421c6c4fe4880a0f94708dc2687adf0824a03b289cafbc
font_01_sfnt_off0000e44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC63 10764 bytes
SHA-256: e19279a95a6f6ef333ebe026ffa547be07b8f3bee68e90bfa46d8d441eb0aee3

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