Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e091b2633bb4f18…

MALICIOUS

PDF

83.5 KB Created: 2021-03-07 12:01:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 44bfc2dccdc61a9fe7c58a9dee45e776 SHA-1: 24a1b9c33b87aa96215a3561ae820271baf36f23 SHA-256: 4e091b2633bb4f183644e853fecfdbc334866e9b4a776dc4fea56fd8353d7478
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified a large number of external links, suggesting a link farm or redirection mechanism. One of the primary external URLs observed is `https://dugedepap.ru/strik?utm_term=is+fury+on+netflix`, and another linked PDF is `https://cdn.sqhk.co/teketerep/9lV6tuO/suvinomoke.pdf`, indicating a potential phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/strik?utm_term=is+fury+on+netflix PDF link annotation
    • https://cdn.sqhk.co/teketerep/9lV6tuO/suvinomoke.pdfIn PDF document text
    • https://cdn.sqhk.co/pubamegumox/QhihdgO/celebrity_cruises_us_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/parikozug/gQSyPgU/marketing_mix_4ps_ppt.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/GjduLV1/29352343861.pdfIn PDF document text
    • https://cdn.sqhk.co/julukimesof/Xhd5Hgc/14031254.pdfIn PDF document text
    • https://cdn.sqhk.co/woselukafo/dhcLqgc/only_ones_who_know_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/tabuguran/hjd0Zjg/5655654939.pdfIn PDF document text
    • https://cdn.sqhk.co/venitalobeni/eBhasPM/sims_mobile_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/subetudagoli/gUtWgha/modutulowefawadami.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zesixefe/likanu.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/34243218257.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/abba_mamma_mia_piano_sheet_music.pdfIn PDF document text
    • https://8a3b53b1-4b9a-43fa-8d11-acca05b1aa90.filesusr.com/ugd/7ad284_c880afd484984a41ba6400c9d6064f90.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/taturi/cisco_packet_tracer_free_softonic.pdfIn PDF document text
    • https://b01ec662-dec5-4f54-b977-8708717d6054.filesusr.com/ugd/07e02c_0b738c3eb58144f38981a30bbe4bfc76.pdf?index=trueIn PDF document text
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_f3c214a419ef4eb0b0416c48f8a1744f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/vidmate_option_not_showing.pdfIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_b45cfe94d6c7401aa613427710f8ec1f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nokiva/fraction_decimal_percent_test_part_1_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/dantes_inferno_mark_musa.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/attendance_icons_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/graphic_designer_course_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/nedaluje.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/role_of_parathyroid_hormone_in_bone_formation.pdfIn PDF document text
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_57a2ac40fd1b423896a2e60faa278e97.pdf?index=trueIn 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_off000109e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E3 4660 bytes
SHA-256: 47e84e64244ffd9b2707d7cb414739b949ae595be31dfe22de3004bd1082176f
font_01_sfnt_off000119d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D8 11552 bytes
SHA-256: a387fe3ed7a98623d0d312505ba98e931bf1130e19852910919911972139b628

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