Malicious PDF — malware analysis report

Static analysis result for SHA-256 0555419a3b6ad5b3…

MALICIOUS

PDF

81.1 KB Created: 2021-03-27 21:17:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 060a46684b90950e16eb1e7cd8970844 SHA-1: 85f51162bd0a88287132f12116ede4d76a606b88 SHA-256: 0555419a3b6ad5b353f4691b25f1d829be2be4c515695e50e1c8ce25548e4058
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high probability of malicious intent. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The primary purpose appears to be directing users to external resources, potentially for phishing or malware distribution.

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://druttle.ru/award?keyword=30+day+bodyweight+beast+mode+workout+plan+pdf PDF link annotation
    • https://wujibinofowe.weebly.com/uploads/1/3/1/3/131383737/196968.pdfIn PDF document text
    • https://cdn.sqhk.co/jezofadu/Sjac7ii/notification_ringtone_maker_online.pdfIn PDF document text
    • https://golotelarag.weebly.com/uploads/1/3/1/3/131382536/keluxomawutelo.pdfIn PDF document text
    • https://vejevidumuruje.weebly.com/uploads/1/3/5/3/135302175/digoxetazolam-lidakikagapi-bawejezakuvon.pdfIn PDF document text
    • https://xuwupeloz.weebly.com/uploads/1/3/4/7/134734270/fdbc6c.pdfIn PDF document text
    • https://desujerobum.weebly.com/uploads/1/3/1/0/131070458/ralubemux.pdfIn PDF document text
    • https://cdn.sqhk.co/vetukalujir/D93Mmhg/tractor_tow_heavy_duty_vehicles_pull.pdfIn PDF document text
    • https://rekepepijo.weebly.com/uploads/1/3/4/0/134018016/kabexulupege_vogalimorose_minasiwizeg.pdfIn PDF document text
    • https://tarutugiwom.weebly.com/uploads/1/3/5/3/135326066/jimaki.pdfIn PDF document text
    • https://daxogane.weebly.com/uploads/1/3/2/8/132815110/4d68ab2.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/g1sjigf/91539880159.pdfIn PDF document text
    • https://javetepamez.weebly.com/uploads/1/3/0/8/130814931/bukajirovesog_jobusafozatama_gadifofe.pdfIn PDF document text
    • https://bisebisa.weebly.com/uploads/1/3/1/4/131406118/buletekajov-numew.pdfIn PDF document text
    • https://jufasoxoko.weebly.com/uploads/1/3/5/3/135315704/5139829.pdfIn PDF document text
    • https://cdn.sqhk.co/tudobele/gcida8i/scooby_doo_alien_invaders_crystal_amber.pdfIn PDF document text
    • https://denupadifujufo.weebly.com/uploads/1/3/0/8/130813478/wixeb.pdfIn PDF document text
    • https://jozugirizozixus.weebly.com/uploads/1/3/2/3/132303278/mufazuxamupuga.pdfIn PDF document text
    • https://cdn.sqhk.co/delobepaziw/Uhbjggf/moluwuvufudijorotujinazet.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/jivuxo/guidewire_software_inc_dublin.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/79551889115.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/1646404454.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/eddie_bauer_infant_car_seat_cover.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/kumawuxamagev.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6D 6064 bytes
SHA-256: 64a7637b1fe4756303b2ea32fae8ddef4cefdf475c47c7a8aa17d22994340da0
font_01_sfnt_off000110f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F8 11128 bytes
SHA-256: fa9192b0d97430b55a5d14240b2b8db1361207765dd2e19bbd10cefd0be548c7