Malicious PDF — malware analysis report

Static analysis result for SHA-256 671714d438879864…

MALICIOUS

PDF

73.7 KB Created: 2021-06-07 06:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 300576aa22929d8dd89dfaaa3ac3accc SHA-1: c78ca806c2d3216ca1a53c98652d1a78796b7cc0 SHA-256: 671714d4388798646a95bdf24e29416121cf0cca91db0bc7f12abbcd6a95958d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically flagged as an external URI pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to product sizing, which is a common tactic for phishing.

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://huntic.ru/pbw?utm_term=which+size+aeron+chair+should+i+get PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454306/normal_5fd96d5ebe3eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369901/normal_5ff7c40bd078e.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/5381f135-8f4a-4fc9-beb0-b79cb632f194/bixoradasamobixoxo.pdfIn PDF document text
    • http://suwoluran.pbworks.com/w/file/fetch/144725052/44522503676.pdfIn PDF document text
    • http://fevosezew.pbworks.com/f/52820406720.pdfIn PDF document text
    • http://maxasol.pbworks.com/w/file/fetch/144536253/83601546735.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/w/file/fetch/144423093/dunagisaxokejopigix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1beeb045-0ad4-4280-87f7-e99abacbca8b/48156412353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e4209d1-444e-45d4-92b5-630bac1763ea/what_is_the_protocol_for_covid_exposure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5f472b7-ed0f-46b4-8e67-18031d44cf13/cita_renovacion_licencia_de_conducir_puerto_rico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf3358fc-31b9-4891-a1bc-1de1d458e00a/jojosudimesokew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/182cdaba-447b-4815-8c49-6064d853ffb8/rabawunotuzudan.pdfIn PDF document text
    • http://lururefisu.pbworks.com/f/pelicula_completa_en_espaol_de_annabelle.pdfIn PDF document text
    • http://gulisapil.pbworks.com/f/is_procreate_pocket_good_for_ipad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a32ebdec-322a-44b0-9bff-66c0e3800aae/3291403497.pdfIn PDF document text
    • http://jujupaw.pbworks.com/f/convertisseur_chiffre_en_lettre_belgique.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/591245b2-e89d-45c7-8633-b7955110e748/her_name_in_the_sky_read_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71a584f3-a5c4-4732-9831-aa8a59143818/momozenufat.pdfIn PDF document text
    • http://bomasasawavi.pbworks.com/f/jilape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fe45edc-7f97-430f-a718-76561e15b10f/87145757939.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_off0000e0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AD 5264 bytes
SHA-256: d58408ee78c8df772eae80a90f33f2bcf2d4f5cfdb16a17084e12c7fc9b34470
font_01_sfnt_off0000f2a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A3 11532 bytes
SHA-256: cfd2f312151200286e0032bb0f7c49b1acd912fe8cf76c84f4be7cfa21f48183

Open this report in the interactive analyzer, or submit your own file for analysis.