Malicious PDF — malware analysis report

Static analysis result for SHA-256 37564927e8a271e8…

MALICIOUS

PDF

78.7 KB Created: 2021-04-08 20:26:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a9b59ce965a0cfe74cac230a43e73882 SHA-1: 8438f3b26d0bbb02e54563b6e32959c1db17d07a SHA-256: 37564927e8a271e8ed627c6209ee03b25b47af9db8b97fb0b34b48ff19c790be
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://golowaki.ru/strik?utm_term=the+monkey%2527s+paw+movie+characters PDF link annotation
    • https://cdn.sqhk.co/lovuzegonu/nkjhggT/hotel_transylvania_hotel_havoc.pdfIn PDF document text
    • https://cdn.sqhk.co/zalivelo/xCiiidk/70118969988.pdfIn PDF document text
    • http://fuvisetitisenon.mypressonline.com/l_attrape_coeur_livre.pdfIn PDF document text
    • http://zebiripu.mygamesonline.org/mechanical_drawing_symbols_and_abbreviations.pdfIn PDF document text
    • https://cdn.sqhk.co/zapevexuvot/jie7gd9/action_hero_biju_actors.pdfIn PDF document text
    • http://repizedozoful.sportsontheweb.net/nulawiz.pdfIn PDF document text
    • http://www19216801.site/navien_npe-210a_parts_list38otl.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/hbgeidc/yeet_sound_button.pdfIn PDF document text
    • https://cdn.sqhk.co/rurufimibiwe/lJK8mjb/hair_trimmer_prank_real_razor.pdfIn PDF document text
    • http://beremoter.online/15784726025rhwac.pdfIn PDF document text
    • http://faxozulakevosos.iblogger.org/23423667617.pdfIn PDF document text
    • http://cyberlife.store/music_word_search_answers28evz.pdfIn PDF document text
    • http://axecheat5.xyz/binatudunirasamaxewodog43s3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cc6ccc3-478a-4074-b12c-c88d8f4259e4/doxenosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/304c825a-306b-4661-bf91-482a9c231433/smith_and_wesson_serial_number_date_of_manufacture_j_frame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87b949ac-7216-4cff-8297-75a91cb0cb64/vuxureboza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49d3eaf3-7872-4504-ac50-840998dcafbe/miwosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9270c4c9-1fda-45ba-80b7-892848400c79/59405484796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/319c280a-9553-4c8f-8fd6-f35ba12d5430/banumilegagamemumenav.pdfIn PDF document text
    • http://jinuritubamo.rf.gd/nirenufura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d5a7874-e053-4692-bc4a-a69cd65a01ed/15070796811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/268768a7-095a-45d4-a5d1-5540bfcd1e5d/91685143568.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_off0000f4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BD 5444 bytes
SHA-256: cb1512440d13baa75c0e73159ee8dc16066e37cb54bbeb21a5e2402e231a2d0a
font_01_sfnt_off0001073b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073B 11212 bytes
SHA-256: caf41b2601259c502481747601617e9e9050a20070c293fd9b44b6e26121f314

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