Malicious PDF — malware analysis report

Static analysis result for SHA-256 8717d61d21ce04db…

MALICIOUS

PDF

87.8 KB Created: 2021-03-11 23:13:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: e2dedc9f18bcefc9fd4eedc0d0e5e891 SHA-1: 54278c686033f3fc9e38e2c019021428e3f7c509 SHA-256: 8717d61d21ce04db602be57111d68ceea833875f951f75e5ff74e26a49759a7c
186 Risk Score

Malware Insights

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

This PDF file is classified as malicious, exhibiting characteristics of a link farm designed to redirect users to potentially harmful external websites. The PDF contains numerous embedded URLs, many hosted on disposable domains, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://resalured.ru/award?keyword=etymological+meaning+of+education+pdf PDF link annotation
    • http://tigadugutuvatix.mygamesonline.org/what_medication_is_good_for_period_cramps.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370092/normal_601b76948fe4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481278/normal_60047a1a7188e.pdfIn PDF document text
    • http://zekojotewakugag.mypressonline.com/61411219280.pdfIn PDF document text
    • https://viluxesoxumubi.weebly.com/uploads/1/3/1/4/131406714/7272629.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493610/normal_5fed17fd3e4a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426059/normal_5fefcdba94ffb.pdfIn PDF document text
    • https://nefirekemoziwep.weebly.com/uploads/1/3/4/3/134332842/safitibunumegome.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424951/normal_5fe35c3bd57c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470825/normal_602b3566e0d9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487905/normal_6044dbef61a69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380070/normal_5fda1583a597f.pdfIn PDF document text
    • https://sanajupa.weebly.com/uploads/1/3/1/4/131406847/tutin.pdfIn PDF document text
    • https://somalinoduka.weebly.com/uploads/1/3/5/3/135392385/pikakod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456676/normal_601da9cfe464d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_1580eb5c8c804f1eb1fa5879eab9a53c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dupula/34865966094.pdfIn PDF document text
    • https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_363d95a560624dc2b647525313e49e24.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/wizimol.pdfIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_87fce0ffd3be4a96bd69bf83117b1834.pdf?index=trueIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_3d7bfa8b8f69462aaea45665c9dde25e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mudurixo/bookworm_mobile_game.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/gopro_hero_5_user_guide.pdfIn PDF document text
    • https://f3b86e06-b3aa-4ee1-82f7-79049f3379a8.filesusr.com/ugd/0c4fd2_3ec50ef6bcd54b65aa834fc28c7a86c2.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7A 5144 bytes
SHA-256: 18d570e654d40730d4e706fd66a0ea363bfb111f9f46b16c57934eca74e3b268
font_01_sfnt_off00011ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF2 10732 bytes
SHA-256: 988fb2e7fd42e5d579e1e51cfb9832b93a6b518630fa874dad2e167256b69ab4
font_02_sfnt_off0001439e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1439E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f