Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc6d0fc0e10677d…

MALICIOUS

PDF

78.2 KB Created: 2021-09-29 11:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 954ad39c7068d9fbb2caab5aea71ddd6 SHA-1: dc1c3120273556eea833aa5e6448800603c54748 SHA-256: 5cc6d0fc0e10677dc578c4e79484b5702c4c93241792284877958947f431d31d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable hosting domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents that often leverage embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://archism.ru/uplcv?utm_term=iphone+xr+128gb+price+in+bangladesh PDF link annotation
    • http://pantipplaza.com/userfiles/file/logoromanamuf.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/674021bf1c341c9de1a66d2ddaa96de1/3701212091.pdfIn PDF document text
    • http://dep14kirov.ru/userfiles/file/21855733601.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/g78at2voaupe51h96s0b678ct7/97296640618.pdfIn PDF document text
    • http://xn----ftbkdcamitb5h.xn--p1acf/files/fck/file/dipobis.pdfIn PDF document text
    • http://boldogelet.hu/media/24136582626.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/49279102228.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/8blnup2c1i0gqm8ru4o89979h4/newepawasozaz.pdfIn PDF document text
    • https://angkalaris.com/contents/files/50165757912.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/e75c4e45db9986ddd0a1526b4a0ef683/julifilugewogifepixowuwix.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/80631118340.pdfIn PDF document text
    • http://connect-event.fr/ckfinder/userfiles/files/worubigu.pdfIn PDF document text
    • http://ckud.handysociality.com/upload/files/pisanawatijolox.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/falasidanibusomapefazuk.pdfIn PDF document text
    • http://metabolit.ru/files/file/53282489643.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/wagaji.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/fexopemazewapiju.pdfIn PDF document text
    • http://hanabi-la.com/uploads/files/12416839863.pdfIn PDF document text
    • http://traktor-tv.de/sites/default/files/file/34668232913.pdfIn PDF document text
    • http://erfaspot.com/resimler/files/12294454677.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/50561935239.pdfIn PDF document text
    • http://star-transform-moscow.ru/uimg/files/12411252072.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b11f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB11F 19496 bytes
SHA-256: 1a142171b3664795e3f02701e2f47fab3fbf3441f33b696cab7df9430d873b95
font_01_sfnt_off0000e2dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000faf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF3 11268 bytes
SHA-256: d76ec035be974db4f8590641682d2abadb0c6db32f4182ea928a7011ea1f2a32
font_03_sfnt_off000114f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F9 16232 bytes
SHA-256: 01cd0e4798e93fb086042d610f43ddeed7bf091af48aa863f5c4a4f61b651684

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