Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab0fc8ab5344a9c…

MALICIOUS

PDF

71.9 KB Created: 2021-10-01 19:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e46f11baf979cdc2bd4fc9866a6fd140 SHA-1: cc106af6368328a07a59b7ba1d75ef90fc54561b SHA-256: fab0fc8ab5344a9c8103f88e47c055a56d8b0ce23656995ca323eddb013295cd
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URLs, many pointing to compromised CMS uploads or disposable hosting, suggests a phishing or scam attempt. The 'SE_CALLBACK_LURE' heuristic specifically indicates the document likely prompts the user to call a phone number, a common tactic in tech-support scams or refund fraud schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://huntic.ru/uplcv?utm_term=nine+algorithms+that+changed+the+future+pdf+download PDF link annotation
    • https://arerp.kr/data/file///zunadu.pdfIn PDF document text
    • http://nhungbaithuocnam.com/img-tvdl/files/52946359488.pdfIn PDF document text
    • http://polishingmarblefloor.it/userfiles/files/sunovetebalavenimipozazi.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210928132352.pdfIn PDF document text
    • https://djecijagarderoba.me/userfiles/file/44200772168.pdfIn PDF document text
    • https://feniks9.ru/ckfinder/userfiles/files/zezebumi.pdfIn PDF document text
    • http://rc-modeller.se/images/file///13193375874.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614efb8c96f86---72240142244.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/misiginatupax.pdfIn PDF document text
    • http://air-ned.com/uploads/files/86860821396.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/20673719113.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16151a16042fa1---66242373626.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153f6b7aa06a---46238093666.pdfIn PDF document text
    • http://softtox.com/new/userfiles/file/pajozifobes.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/90201797748.pdfIn PDF document text
    • http://xn--zb0by3yusal20ak5lcidnwigi.com/ckfinder/userfiles/files/1632203677.pdfIn PDF document text
    • http://cudicio.it/images/file/60801031126.pdfIn PDF document text
    • http://polyacer-ecp.com/userfiles/files/20210912_042412.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/57642431ea93e5333c7123ab7fac40b8/kijelepizobagugaxori.pdfIn PDF document text
    • https://udruga-invalida.hr/files/61531440249.pdfIn PDF document text
    • http://podarox.ru/public/files/lezadetubigejepor.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/f869353a639f0fb1f9c6f72a3d884638/15377085087.pdfIn PDF document text
    • https://hoya.hr/UserFiles/file/dasedemopumavawewux.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f10486c847---73720422208.pdfIn PDF document text
    • http://studiomanzetti.it/userfiles/files/68783997124.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613455a8abb32---94791972514.pdfIn PDF document text
    • https://equinox-e.com/upload/files/555438515.pdfIn PDF document text
    • http://candleelectricals.com/uploaded_files/userfiles/files/worib.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_off0000b4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ccc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC0 11228 bytes
SHA-256: 4a19761a2b25b15b13a34bff50fd248b7c41fe54ebe69c87504912207bedd5cd
font_02_sfnt_off0000e6b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B7 16728 bytes
SHA-256: 25039a7eb81323437e440a1dd8f2306bf41e311c80bb4d0890eaf0a5c761d3f6

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