Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e94c79ddc6572c…

MALICIOUS

PDF

82.3 KB Created: 2021-03-31 14:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d3bf3888514d26a787c04ec132f41591 SHA-1: 22e2643fba8ec852c3b73b53ad0cc912d696b3df SHA-256: 10e94c79ddc6572c6f5e1c34e071565bb1f885e4ca50fb5bcdd1c5d767006f19
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a high-severity heuristic indicating it's an image lure linking to an SEO redirector, specifically pointing to 'https://zajinet.ru/123?utm_term=platform+bed+with+drawers+full+size'. This suggests a phishing attempt designed to trick users into clicking the link, likely for credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://zajinet.ru/123?utm_term=platform+bed+with+drawers+full+size PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4488592/normal_5ff3d41230a2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491687/normal_5ff91c46e7453.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478141/normal_5ffca7ad40c99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414682/normal_5febc1c1aa18e.pdfIn PDF document text
    • https://cdn.sqhk.co/poxufape/ibhfjcr/osu_duo_mobile_new_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/voxedifi/QCpghCh/labexuxipepinogetuxak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471969/normal_6028fa12e436c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445114/normal_6015fd683d109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403820/normal_6058330ddae21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501212/normal_60621a9ff290e.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzaxepigi/zBRiMig/yumeji_s_theme_sheet_music_violin.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/wgggfse/counter_terrorism_degree_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/gdcpihJ/fotatuvone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458144/normal_6025cd11942a2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://budamugaf.rf.gd/movable_ukulele_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/kuref.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/maze_runner_1_full_movie_download_in_english_480p.pdfIn PDF document text
    • http://jovukanuwu.rf.gd/wirexavunapa.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/1996_jeep_cherokee_obd_codes.pdfIn PDF document text
    • http://durumam.epizy.com/96911442891.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001030b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030B 5428 bytes
SHA-256: 2245849c3464b508ead75dfb9844de664e7cee212f360eaa2f16b08e7f0f35a7
font_01_sfnt_off0001156f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156F 11228 bytes
SHA-256: 22abc3031f2eb7f806bf986b39f4ee5b540a577145d0ea26afaba3643cd69fe3

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