Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaf6b0431ab02ade…

MALICIOUS

PDF

76.1 KB Created: 2021-09-19 22:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 63141c5e1bd62fc861be88290eb2a0a5 SHA-1: 4535b7d7f987bf6ebe39325e51f29c521b46766b SHA-256: aaf6b0431ab02adea7814decc5794c9359a4c886fe247195a86a6718226e9036
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of urgency lures further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://laborke.ru/uplcv?utm_term=super+pads+pro+apk PDF link annotation
    • https://livre-d-art.com/ckfinder/userfiles/files/datiwu.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/12096249903.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zexapukikobosukexifedu.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/narobofafoxiselibusa.pdfIn PDF document text
    • https://ikansambel.com/contents/files/82822383016.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/11835983287.pdfIn PDF document text
    • http://freestyler.cz/img/file/53993051354.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/85391779427.pdfIn PDF document text
    • https://www.zochrot.org/ckfinder/userfiles/files/bapelubegofakufasilup.pdfIn PDF document text
    • http://apple888.vn/luutru/files/pojipajabitirotoguvobef.pdfIn PDF document text
    • https://khmernative-rice.com/userfiles/file/49885291773.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/0u7rrb1vflfsibbneoofqn0efh/moletamunasuvoxigejoz.pdfIn PDF document text
    • https://luathoanghuy.com/uploads/files/vezatatubasego.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/xumumoxabetemed.pdfIn PDF document text
    • http://markjfox.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/54756623353.pdfIn PDF document text
    • http://domuran.pl/files/file/ganit.pdfIn PDF document text
    • http://schokofontaenen.de/idata/3008082376.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/fc227e86230115d67665a444c44c34f2/71091706581.pdfIn PDF document text
    • http://soc-in.com/data/media/files/70885013530.pdfIn PDF document text
    • http://tcihk.com/userfiles/27941033336.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161422c8519f90---15763149993.pdfIn PDF document text
    • http://rockycheng.com/ckfinder/userfiles/files/powamarixutirijaretoneb.pdfIn PDF document text
    • https://fresh-cherries.com/ckfinder/userfiles/files/78457966408.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/betesopa.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_off0000c0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0CC 10312 bytes
SHA-256: 4f60fdde10678b6353424f5c294bfcd2f8b67e3a23d2dfd778069f3a8e4ea6fa
font_01_sfnt_off0000d81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81F 19792 bytes
SHA-256: 6eb223ab2d3b05689ebdfab1c6413ff1aa0d173c5c654ff5539cd2eb584f883b
font_02_sfnt_off00010abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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