Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ad6299ca018e2d…

MALICIOUS

PDF

71.0 KB Created: 2021-06-06 19:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9ba64d48d35ea34a1c333c6c6370cee3 SHA-1: e3e01dacf0c74077f4d26eee46a788fd8666c832 SHA-256: 65ad6299ca018e2ddff66c6986685bdb4c6b690861adb6ca5628246db49eb689
186 Risk Score

Malware Insights

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

This PDF document functions as a link farm, presenting itself as a search result for 'how can i get snapchat on my android phone' to entice clicks. It contains a large number of external links, many hosted on disposable domains, suggesting a phishing or spamming operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://coretry.ru/pbw?utm_term=how+can+i+get+snapchat+on+my+android+phone PDF link annotation
    • https://tazeviguso.weebly.com/uploads/1/3/4/3/134339516/bozederema.pdfIn PDF document text
    • https://nakosedamewa.weebly.com/uploads/1/3/4/6/134612328/boget.pdfIn PDF document text
    • https://nexonurobev.weebly.com/uploads/1/3/4/3/134371674/kumolovemetip.pdfIn PDF document text
    • https://malibuvebejonab.weebly.com/uploads/1/3/4/5/134524684/setipo_viturisesaramud_rimujuru_kenur.pdfIn PDF document text
    • https://tesetugunujogub.weebly.com/uploads/1/3/4/0/134040467/aaf8ec7c0d00fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485589/normal_606ba8bc9db72.pdfIn PDF document text
    • https://jatasurow.weebly.com/uploads/1/3/4/3/134358583/50b367408248bab.pdfIn PDF document text
    • https://fivixevovisobav.weebly.com/uploads/1/3/1/3/131380347/xixaradixudob-jirulagu-zosozoruk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484633/normal_5fff24cbd7325.pdfIn PDF document text
    • https://tudepaweper.weebly.com/uploads/1/3/4/6/134607512/1abaf23ba189.pdfIn PDF document text
    • https://tiketutowiko.weebly.com/uploads/1/3/5/3/135345961/97b61a5cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411691/normal_605655d6b13dc.pdfIn PDF document text
    • https://nezogifoxo.weebly.com/uploads/1/3/1/6/131637357/f6ec1f71f7.pdfIn PDF document text
    • https://sobaxijuxoje.weebly.com/uploads/1/3/4/2/134235367/finevinevaxos.pdfIn PDF document text
    • https://zubujaxu.weebly.com/uploads/1/3/4/5/134585886/d345f5a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/645a77fb-180f-4f8c-b838-eeadf17f12bc/9275786967.pdfIn PDF document text
    • http://sijomirurefi.pbworks.com/w/file/fetch/144699459/vuratuzedirojuwizipipubap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ca91a8b-fcd9-4c15-814a-d0352440b5ea/how_much_does_it_cost_to_send_a_dog_to_training_school.pdfIn PDF document text
    • http://wiwedano.pbworks.com/w/file/fetch/144425286/angry_birds_pc_games_online.pdfIn PDF document text
    • http://werinenimuta.pbworks.com/f/zombs_royale.io_unblocked_6969.pdfIn PDF document text
    • http://fagimox.pbworks.com/f/practice_2-1_evaluating_and_writing_algebraic_expressions_answer_key.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_off0000d8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A2 5608 bytes
SHA-256: 4af713e74f63163ab5931879639af96bc6fdcb38667b6aabca15089cf6a32304
font_01_sfnt_off0000eba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA8 10152 bytes
SHA-256: c632aed4e118adca48e3fb0887532ff19d6ea6fd14a2f0c3c1810a11239bcd64