Malicious PDF — malware analysis report

Static analysis result for SHA-256 0202e19af02f2766…

MALICIOUS

PDF

85.2 KB Created: 2021-03-23 15:02:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5f07219782d7a68db71eb963ca31defd SHA-1: 77ec77b6b611fb4653e4a90001df97807a25d904 SHA-256: 0202e19af02f2766ee5980e153045562864cf05e12f671754eb8962e4ac2072e
186 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, suggesting a link farm or phishing attempt, with one prominent URL being https://midufefew.ru/award?keyword=mcdonalds+online+application+pdf. The document body, though heavily obfuscated, references 'Mcdonalds online application pdf', reinforcing the phishing lure. No scripts were extracted, but the PDF structure itself is designed to host and present these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://midufefew.ru/award?keyword=mcdonalds+online+application+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482230/normal_5fff73f34468e.pdfIn PDF document text
    • https://tererenigi.weebly.com/uploads/1/3/1/4/131405956/8982350.pdfIn PDF document text
    • https://cdn.sqhk.co/sewizefaxiki/oedhewL/30904501897.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/nGnhgge/plant_versus_zombies_heroes_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421461/normal_60312de0ca2e7.pdfIn PDF document text
    • https://cdn.sqhk.co/gizetinediz/0id1VEn/67031064431.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/19jjDjj/x-_men_the_last_man_stand_cast.pdfIn PDF document text
    • https://movediwifed.weebly.com/uploads/1/3/2/6/132695881/kiwilupogovabu.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/DixjdRJ/withings_scale_fitbit.pdfIn PDF document text
    • https://cdn.sqhk.co/vafodagusun/egj0ii7/borelesumufa.pdfIn PDF document text
    • https://cdn.sqhk.co/kagalitisup/uHmidP4/amazing_talking_bird_videos.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxabofapuw/5Rgcifn/forulaful.pdfIn PDF document text
    • https://cdn.sqhk.co/sevijeruba/4hbthhm/ping_pong_balls_target.pdfIn PDF document text
    • https://cdn.sqhk.co/dovumisiwe/JgjAdhd/tagukomejid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504870/normal_5fedd7b19b707.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393908/normal_602b652f535ad.pdfIn PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/91dc31e8ace68.pdfIn PDF document text
    • https://cdn.sqhk.co/bikakigiben/Jxkgfhh/27318617340.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/Vljbzgi/gejevodul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500887/normal_602ae76f611b7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://aca56392-15ae-48e8-982c-fdf6c4ac0dc3.filesusr.com/ugd/00c070_f9e505a8b10d43f79b5a5da5226aef6e.pdf?index=trueIn PDF document text
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_4c77313d804a46b486b2809321695284.pdf?index=trueIn PDF document text
    • https://8f1ef4f7-3f23-41ef-a3d6-4e5873a175a2.filesusr.com/ugd/d318ce_230754f60c334c4081d85a8cb0bda15c.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_off00010d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1D 5056 bytes
SHA-256: 6d5fe16f35ebd839f12efc4ad4643453e803fcf31701537c42d4ccf23e75318a
font_01_sfnt_off00011e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E74 11688 bytes
SHA-256: 48d0ffd0f6a9767957a21c80197b354910c548924740da7d19a42b2ed2a756eb