Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0688832b9623511…

MALICIOUS

PDF

74.8 KB Created: 2021-01-18 19:06:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 548b2cf6bfa7c8cf2875e280014a1a9d SHA-1: e189b05a0a7ad77fcdfa759521eaa2f73477a677 SHA-256: a0688832b962351168bb78324319ee164446302ec76f6e29409a09fe6a6310ff
136 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an SEO redirector URL suggests a phishing lure, likely attempting to trick users into downloading further malicious content under the guise of educational material. No scripts were extracted, but the PDF structure and embedded URLs point towards a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/aws?utm_term=prepositional+phrase+worksheet+grade+6+pdf PDF link annotation
    • https://cdn.sqhk.co/wazafanez/tzjcGet/subway_surfers_princess_runner_mod.pdfIn PDF document text
    • https://site-1177067.mozfiles.com/files/1177067/10609169621.pdfIn PDF document text
    • https://site-1193467.mozfiles.com/files/1193467/rejabutiwexavusasopejax.pdfIn PDF document text
    • https://cdn.sqhk.co/repipedifavi/Ridtfgf/ultimate_sea_monster_2016.pdfIn PDF document text
    • https://cdn.sqhk.co/ritafase/ihiheif/rise_of_kingdoms_codes_october_2020.pdfIn PDF document text
    • https://site-1174390.mozfiles.com/files/1174390/best_high_graphic_android_games_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/mhihgjf/monumekamigidapo.pdfIn PDF document text
    • https://cdn.sqhk.co/zopimoforaja/dBsRNJT/best_police_siren_app_iphone.pdfIn PDF document text
    • https://site-1173584.mozfiles.com/files/1173584/shaolin_kung_fu_training_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/B0iajgA/41126825833.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/U9jgZ7f/metaphysics_meaning_in_bengali.pdfIn PDF document text
    • https://cdn.sqhk.co/fetadupozo/fLhdPmN/64017359483.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kagufunoziwezu.epizy.com/37605133682.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/chernobyl_hbo_trailer.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE765 5616 bytes
SHA-256: 19da73df0285b1feda226fdb0a54b8820c7b2463b22c4b7ab0822d43975c2b5d
font_01_sfnt_off0000fa8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8D 10328 bytes
SHA-256: 245f7791c549d0b63812f658187a76267090c6b8cbbdfd60c3be392f3484940f

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