Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f98a290d8e6a92…

MALICIOUS

PDF

88.5 KB Created: 2021-05-17 05:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ea86265e084dca5fa450cccf372ce3a7 SHA-1: 6cef6f797d14a756446e28adb8052d2d69c6a044 SHA-256: 34f98a290d8e6a920acefe69199164c848733afb92befdbcb8d0f3aa7fff69f6
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, appears to reference 'Dyson dc50 animal troubleshooting', suggesting a lure to trick users into clicking malicious links for fake support. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://jumiwimov.ru/strik?utm_term=dyson+dc50+animal+troubleshooting PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407316/normal_5ffd4724e72d0.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/gibtVLb/knock_down_bottles.pdfIn PDF document text
    • http://vuxilenusip.mypressonline.com/chrome_online_editor.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/gghc0ig/diy_wooden_gun_cabinet_plans.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458621/normal_60276d756d351.pdfIn PDF document text
    • http://fruitslope.online/android_room_typeconverterwdhfm.pdfIn PDF document text
    • https://cdn.sqhk.co/roratumopiv/cZi0Cjh/all_mileena_skins_mkx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452161/normal_60011fae311d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376375/normal_5ff4cf94acf44.pdfIn PDF document text
    • http://nomenowunesazoz.scienceontheweb.net/bourdieu_forms_of_capital.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418755/normal_5fd84d61a1a1f.pdfIn PDF document text
    • http://2022god.com/how_to_train_your_dragon_4_full_movie_in_english_2019cy2op.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5fd84c10623ff.pdfIn PDF document text
    • http://tonevagewalilu.medianewsonline.com/55981427582.pdfIn PDF document text
    • https://cdn.sqhk.co/libibamudo/igU0Kie/brothers_in_arms_cheats_android.pdfIn PDF document text
    • http://pokupka.space/walalagiduzuximatuns0xth.pdfIn PDF document text
    • http://whalesqpa.fun/97866740966rw7mv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416672/normal_60472ea4b6373.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_601df76d7f1c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_60219e3c4af58.pdfIn PDF document text
    • http://yourcy.com/gavukuvur74pfo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ae8c1479-5121-4009-b0ed-8259dbb1205b.filesusr.com/ugd/0aff45_b1911809a9994793996e8964cbca29d4.pdf?index=trueIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_a08d3ca149d24167a023d63689b1f7f5.pdf?index=trueIn PDF document text
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_537e2d7f99a14c34a5a0a4bb93ce1c5e.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_off0001191b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1191B 5860 bytes
SHA-256: 9508ab54998619d5027de7d8179bddedd6510459c7ce6225c6a85a0c482540dd
font_01_sfnt_off00012cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF3 11540 bytes
SHA-256: 24ee7c36dfd200249ff8ff16e629cd95f3581a1daec0093b4f754afee73a1966

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