Malicious PDF — malware analysis report

Static analysis result for SHA-256 a985bad818b21e3e…

MALICIOUS

PDF

67.8 KB Created: 2020-12-04 23:39:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f14c5c3910494bfa954cbe305cb44969 SHA-1: d564180d5b426b53665022b2ac485f5402f5e70c SHA-256: a985bad818b21e3e7d54db2875053d16044965f57207d955036058f9c630a949
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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 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.
  • 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://trafffe.ru/123?utm_term=ps+vita+charger PDF link annotation
    • https://tofuxatedev.weebly.com/uploads/1/3/4/7/134706151/nupopizaxo.pdfIn PDF document text
    • https://nabolonoroxene.weebly.com/uploads/1/3/4/3/134373159/ninavu.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/nepawigexa/animal_physiology_mcq_with_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffb332bbd740658015355/t/5fc1e40208845d0924cef7f2/1606542338811/craigslist_tucson_arizona_cars_and_trucks_for_sale_by_owner.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/lovifafijomuxubefozobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/583efe18-d88e-4121-9b10-e3b5978df633/lojebukisiwokiforajal.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/febifoduwus.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/blade_runner_2022_legendado.pdfIn PDF document text
    • https://s3.amazonaws.com/tabagelufazafew/benton_county_ar_active_warrants_list.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/32945919925.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/134537ec-4776-4d76-96f8-278521e027b5/80742372175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc84f485-32c4-4a57-a2bb-9fcd36cd6876/3458883414.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5932f0b6b03258f55155a/t/5fc6dc0bb7521d608a34329c/1606867980668/sinusajib.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/51783488966.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/escape_from_chernobyl_android_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0cd7862-267d-4eb8-9fa8-c03eecd1e209/the_prince_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9227c3c4-e26f-4478-96bd-b515997ae1d2/antenna_and_wave_propagation_basics.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA06 5088 bytes
SHA-256: 3a12301c984600cd6dcd1f9ba782d44eac254e5e285c247c86ccc535d4773a1b
font_01_sfnt_off0000db5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5C 11200 bytes
SHA-256: cc76c60f50e6a26ce1a78fa1c6732ef2257bf1c1b9805bd546e121e9e9d02314

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