Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c02e7d2bc0b6470…

MALICIOUS

PDF

82.1 KB Created: 2021-02-24 02:11:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 00935a635659ade4e82f76f0dad3ce87 SHA-1: c0fd1eefbd6524b55e0c359523882d6db89b357d SHA-256: 7c02e7d2bc0b6470c6316a3c719fc75cc13c6d5fb073c3385fe47e9d0f0b85cc
186 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. While no scripts were directly extracted, the presence of numerous external URLs indicates an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://leonvi.ru/aws?utm_term=how+to+port+android+to+iphone PDF link annotation
    • https://cdn.sqhk.co/lorakerasima/jhhgigi/lg_xboom_go_pl2_price_philippines.pdfIn PDF document text
    • https://cdn.sqhk.co/zinazejoras/JMggdha/3496304445.pdfIn PDF document text
    • https://silatasetexa.weebly.com/uploads/1/3/1/6/131637876/2783434.pdfIn PDF document text
    • http://sweetmeet.online/bedtime_stories_movie_australian_ratingz71c0.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/8tmigJ6/call_of_duty_strike_mobile_hack.pdfIn PDF document text
    • http://subfamjtii.site/the_electoral_college_map_activity_answer_keyj7o7t.pdfIn PDF document text
    • http://idealicait.website/loteria_de_vocales_para_imprimiriuhku.pdfIn PDF document text
    • https://cdn.sqhk.co/lilodipu/S0hjehb/yandex_us_stock_price.pdfIn PDF document text
    • http://kurs1.xyz/16741799719tywhh.pdfIn PDF document text
    • https://cdn.sqhk.co/sizozizaj/CkzjdPN/best_photo_editing_professional_app.pdfIn PDF document text
    • http://avit0.pro/ulidavaru_kandante_songs_kannadar0urb.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/zuhgNhh/warframe_weapon_mastery_locked.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwilaj/mjbhdBP/dog_running_drawing_front_view.pdfIn PDF document text
    • http://rcasino.info/canon_powershot_elph_100_hs_user_guidef35ls.pdfIn PDF document text
    • https://dufubixapitosig.weebly.com/uploads/1/3/4/5/134503348/pititan.pdfIn PDF document text
    • http://enots.space/cross_stitch_christmas_starsqu13t.pdfIn PDF document text
    • https://pavibizad.weebly.com/uploads/1/3/0/7/130740264/ab4a88bcb8.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
    • https://s3.amazonaws.com/wulagisi/40084619006.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_off0000f689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF689 4680 bytes
SHA-256: bb80c28bd2a3a5b839091392dd7586a52aa9d7c779f2cdf71da993b64dfa0f3f
font_01_sfnt_off00010666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10666 11272 bytes
SHA-256: 39625a84dfc209151437894a58077ec8fae5f9de436daebb90218d960cd67fd1
font_02_sfnt_off00012cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB6 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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