Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0a8aa580defe30…

MALICIOUS

PDF

78.3 KB Created: 2021-03-03 14:20:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5f0044fcad8801b8635a638490bc208c SHA-1: 9c8101fcb056d4a235a353dd9331dd1f8fab8184 SHA-256: be0a8aa580defe3099af51ece323388bda9e9d3f01cbf189dd527734b0b2447e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://jottigo.ru/wix?keyword=metro+2033+trophy+guide PDF link annotation
    • http://sowopezamiw.medianewsonline.com/peter_pan_book_series.pdfIn PDF document text
    • http://help-copyrightviolationhelpcenter.com/zoweseriwuritesunepipzrv69.pdfIn PDF document text
    • https://cdn.sqhk.co/vidujubotaf/f1bhMWA/35893533705.pdfIn PDF document text
    • http://alania365.ru/apsc_exam_2018_answer_keyerd9i.pdfIn PDF document text
    • https://cdn.sqhk.co/figoveraboj/P7jczjf/weather_chicago_hourly_forecast.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479705/normal_601ab79dc2084.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/j6SijsN/vupalawefen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420752/normal_603d0313409c0.pdfIn PDF document text
    • http://fupefabesosada.mygamesonline.org/what_superhuman_powers_do_gods_have.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/what_questions_does_a_genetic_counselor_ask.pdfIn PDF document text
    • http://getsol.xyz/10592009247bjy0r.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosira/olhehdV/other_names_for_business_owner.pdfIn PDF document text
    • http://graatorama.fun/54661861202t876j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478926/normal_603bb2cdf183c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389106/normal_5fc977c1a4257.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pevipitoz.atwebpages.com/nukemuse.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/twitter_new_version_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/where_is_the_navy_base_in_jacksonville_florida.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/mainstays_computer_desk_assembly.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/9448569443.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/gakinomuj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE804 5120 bytes
SHA-256: db164bc4307dfd36ecbb334278e3fd240ce46057aad319ec485180745a9a5163
font_01_sfnt_off0000f996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF996 10692 bytes
SHA-256: d3d53bb1112f901960aa0711f203695cf439648f2484dff2fac23722a3840b1d
font_02_sfnt_off00011e34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E34 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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