Malicious PDF — malware analysis report

Static analysis result for SHA-256 70fc48a9482d10c8…

MALICIOUS

PDF

78.0 KB Created: 2021-05-10 02:48:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 432b388098f9e9a53436dd8259dde556 SHA-1: 9a152c5292f0e4d1cd1826f96b8a9df16d11f689 SHA-256: 70fc48a9482d10c835825fac3c93ca11b21cddc898a18dd0dca7b2e3baef618f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/strik?utm_term=pre+reading+strategies+for+elementary+students PDF link annotation
    • https://kazenoti.weebly.com/uploads/1/3/2/7/132740362/8743307.pdfIn PDF document text
    • http://websecurer.tech/californication_season_2_episode_3_freepnuqh.pdfIn PDF document text
    • https://gakewejodum.weebly.com/uploads/1/3/4/9/134902465/5310860.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423145/normal_5fce231e1615a.pdfIn PDF document text
    • http://logvoz.ru/how_to_charge_ps_vita_1000_without_chargerddhov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403262/normal_5ffb565f63504.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459776/normal_604fd07be0a06.pdfIn PDF document text
    • https://lafotavesa.weebly.com/uploads/1/3/4/6/134633764/fupifuz-tezimexur-papuladovuse-rigaxizo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420431/normal_5fef43eea7c52.pdfIn PDF document text
    • https://safupoxex.weebly.com/uploads/1/3/2/6/132683070/60dbb600c0690.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419192/normal_60042056377a0.pdfIn PDF document text
    • http://babblescoop.store/how_to_make_simple_tissue_paper_flowers_step_by_stepnid3d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jigujirew.epizy.com/57511048255.pdfIn PDF document text
    • http://kagiwabiluwotel.epizy.com/jupuxupodatibafujafiwi.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/chupana_bhi_nahi_aata_flute_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/ninabezik.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/what_is_embryonic_development_in_humans.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/does_death_penalty_deter_crime_essay.pdfIn PDF document text
    • http://gekikebikujog.rf.gd/jio_whatsapp_app_video_tamil.pdfIn PDF document text
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_3e67ce03b6f34367a0eb9309531eab3d.pdf?index=trueIn PDF document text
    • https://cc46d2ba-e7cf-42f8-aa62-b015a0c17ef0.filesusr.com/ugd/d180c3_e77684b1ba4f4aa5a05647429e023d17.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_off0000f48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48F 5328 bytes
SHA-256: 775f63ed7a446bcd12b3f3961563f4e0f3229caeb9977fa8ad56995e9ba26c55
font_01_sfnt_off000106a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A5 10076 bytes
SHA-256: 81d3a88816fb8fdd77f99d6a9e893c47b2b129fff0eed03b12f5d36a2bd3fe46

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