Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d182cddc723bab…

MALICIOUS

PDF

83.3 KB Created: 2021-03-23 19:22:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 57cd0d98bec447d756981004b6c5ec2c SHA-1: b91ebce17d4ac8d93ee4b5260de99ef38eb54326 SHA-256: d6d182cddc723bab97d21813cf0585631900691a450c1e381636e53a75c0c5c2
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 6

  • 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.
  • 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://zajinet.ru/strik?utm_term=a1c+conversion+chart+2018 PDF link annotation
    • https://kusijavi.weebly.com/uploads/1/3/4/3/134385668/lojosoja.pdfIn PDF document text
    • https://tofavasexivefet.weebly.com/uploads/1/3/4/5/134578877/8877077.pdfIn PDF document text
    • https://dabusoze.weebly.com/uploads/1/3/4/5/134585091/pewusabojalo.pdfIn PDF document text
    • http://bitsracing.net/3789206313jh70t.pdfIn PDF document text
    • http://lakshmi-store.ru/mebifemebojrsvi7.pdfIn PDF document text
    • http://trellos.fun/will_ps5_have_ray_tracing0tg52.pdfIn PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/de2c2d7a3de9e.pdfIn PDF document text
    • https://xusikezawijuxop.weebly.com/uploads/1/3/1/4/131407227/jasalezaveri.pdfIn PDF document text
    • https://wemubutuve.weebly.com/uploads/1/3/6/0/136090051/041aff97.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/jozaponi/business_website_templates_free_html5.pdfIn PDF document text
    • http://kesuzidadubitik.rf.gd/wepofudikarexutitip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f75ad644-33c6-4e03-8846-467aa55a8d2f/how_to_use_maytag_gemini_double_oven.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/39527467842.pdfIn PDF document text
    • http://javajese.epizy.com/can_u_cook_rice_in_a_pressure_cooker.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/cookie_run_jelly_pop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7074c28-0812-4f40-9390-42db60858770/are_pokemon_red_and_blue_the_same.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AA 5424 bytes
SHA-256: d4156526cdee5f2ed7200dccc20033dc5db437dde0c11a55e978426d5c669903
font_01_sfnt_off0001041a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041A 10928 bytes
SHA-256: a9a8ad48b87133879febc647fd0777c7a0210379928cf624973765df3dfd12ec
font_02_sfnt_off000129b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B5 16080 bytes
SHA-256: 419589107fc56601c9b04419f17c215e5f14bb407a84c116f10b58ab6236b798

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