Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d4947d95814c59a…

MALICIOUS

PDF

82.6 KB Created: 2021-02-23 00:56:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 799f01218111ced848bfa4b52d4a2052 SHA-1: d7e8bec9d720e7e77281b4060a9cdbb5ac288ce8 SHA-256: 1d4947d95814c59a5d3854051b6734831823195fda4ecff9f00372887853ec4c
166 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-severity rule indicating suspicious links and a link farm on disposable hosting. The ML classifier also strongly indicated maliciousness. The document contains numerous external links, many pointing to PDF files on suspicious domains, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the structure and link farm behavior are indicative of a malicious lure.

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://maypoin.ru/strik?utm_term=howard+miller+grandfather+clock+cabinet+key PDF link annotation
    • http://itawegan.space/niwasogutokabtg7g8.pdfIn PDF document text
    • http://todayshop.website/5458715944h50im.pdfIn PDF document text
    • http://hookup753.fun/1792793426zucv5.pdfIn PDF document text
    • http://ridunculus.com/runescape_corrupted_creatures_slayer_guidexfbu0.pdfIn PDF document text
    • http://com-login8.xyz/travis_scott_goosebumps_mp3_downloadpw025.pdfIn PDF document text
    • http://wide-do.top/18668135363tpikw.pdfIn PDF document text
    • https://nuxutesinof.weebly.com/uploads/1/3/1/4/131437012/zitomesasekagisir.pdfIn PDF document text
    • https://cdn.sqhk.co/bexutavukaro/fU8ujh9/77467009013.pdfIn PDF document text
    • http://doweryklkq.space/fitbit_charge_2_strap_size_guiderhejs.pdfIn PDF document text
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/3390946.pdfIn PDF document text
    • https://kavosimodo.weebly.com/uploads/1/3/4/9/134901779/5c8bcc6489.pdfIn PDF document text
    • https://lebabipiw.weebly.com/uploads/1/3/0/9/130968925/rukevepav-bavoso-laludipurisagap-vegof.pdfIn PDF document text
    • http://myirn.icu/gerosatijofiliporove1o85o.pdfIn PDF document text
    • https://cdn.sqhk.co/koditisalupe/jjdTeQ3/vibebepurulobonulo.pdfIn PDF document text
    • http://voicebftyi.com/pegudobetukqn6w.pdfIn PDF document text
    • http://fruittea.space/unicorn_free_icon_packehxin.pdfIn PDF document text
    • http://bnatural.space/cabrio_washer_not_draining_or_spinning4txia.pdfIn PDF document text
    • http://english-10.site/48006816744j1ocl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ec54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC54 6500 bytes
SHA-256: 56c9d1e58b4dc810ef462bcfb46585b116f29e361e2d914576136dbbbcfa282f
font_01_sfnt_off0001028d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028D 5616 bytes
SHA-256: 6700575dc85ead15e0b4a4406533ebc023e964a32f89e63805268ba8d6f41227
font_02_sfnt_off00011599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11599 11468 bytes
SHA-256: ba7dcaaab9b375a7020683679f8193ed97715d3745ade658113840a7265befda

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