Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ceaf78bb548efe…

MALICIOUS

PDF

91.1 KB Created: 2021-08-02 04:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b040376230d5e95cd02fe38e72396be5 SHA-1: 62739b49a04ae46f2c69ab00eac4589e9845d100 SHA-256: 34ceaf78bb548efea0f5e2b84273b48857c09d798464b902e1606ae1428ce9a5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with a malicious PDF designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://medvor.ru/uplcv?utm_term=737+cockpit+companion+app PDF link annotation
    • https://leuphuotcamap.com/uploads/image/files/75616542675.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/10897904109.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/4c3aac36f7ce7f894958a1d78f2685ec/gijarid.pdfIn PDF document text
    • https://giorgiosantinelli.it/file/zowikibe.pdfIn PDF document text
    • http://12shio5.com/contents//files/18229799440.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc4f571a09---57604953532.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083592f54d8c---95293695557.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6a5f9fc108556bea62ee44e07f92e6a3/77000299651.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/lujovafamebapolidejifasip.pdfIn PDF document text
    • http://parilka.by/var/upload/file/29927448167.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802255894bd---2063508433.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/lvdb3i8hmkvgd7r4i3j5j382aq/webodasikagoborokarop.pdfIn PDF document text
    • http://watsonwilliamsreunion.com/clients/82103/File/79038587807.pdfIn PDF document text
    • http://ippon.lv/uploads/File/zigonexemafixajobe.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/6f04ba5bb057e996bd975710065e6080/wogixanomewasa.pdfIn PDF document text
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/nesabun.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/33958160077.pdfIn PDF document text
    • http://montgomery71.com/clients/34132/File/19715318491.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b7c264845---zojatadivefobegow.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/lewuboradeduvumipi.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/a9ljjorv15btaqatepo8i1pjtv/kilomepexarawufexemop.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a56795adb91---vavufuzojivoropeji.pdfIn PDF document text
    • http://axwelindia.com/uploads/90886341602.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/b16f2b7085c004806f880f6348f36d52/69000016391.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/2e1tpoqrkdb9fmif75gmfera68/23594978542.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_off0000ef3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001074e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074E 17464 bytes
SHA-256: a39d6faaa8d5b4175ba2f114cea292e06ea6bc9409b413aebbc7c33f3066a14c
font_02_sfnt_off000134fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134FD 10304 bytes
SHA-256: ef482d49c8a004e8aaa06e4ea473dfd94dda5c011220b2c751360da328504d4c
font_03_sfnt_off00014c38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C38 5096 bytes
SHA-256: d1ac13145737940c957809ebca5912792b7c2beb0ce35b27f7451915d52351d7

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