Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf4abae59bd85040…

MALICIOUS

PDF

87.5 KB Created: 2021-04-06 06:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c25e4555055b9d7fcf0aa2043d8f20f5 SHA-1: 555876c7fe9314a786433629d0b5b9e3f3a56d27 SHA-256: bf4abae59bd85040435c79425ad165e36b2a500ca7bff374842506bb06f80daf
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains heuristics indicating it is a brand-impersonation credential phishing lure, specifically impersonating Facebook. It also contains multiple external URIs, including one pointing to a known redirector service. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to steal user credentials via a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://fogumisekip.weebly.com/uploads/1/3/4/6/134688141/bca0db29e.pdf.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://baarspo.ru/award?keyword=athlean+xero+free+pdf+download PDF link annotation
    • http://sewakasatixori.medianewsonline.com/11032088795.pdfIn PDF document text
    • https://fogumisekip.weebly.com/uploads/1/3/4/6/134688141/bca0db29e.pdfIn PDF document text
    • http://gapijet.scienceontheweb.net/75640367211.pdfIn PDF document text
    • https://cdn.sqhk.co/pemenixa/3ZMjnjc/zominili.pdfIn PDF document text
    • http://reduslimitalia.site/arctic_king_air_conditioner_user_manual8iot0.pdfIn PDF document text
    • https://dupemokuko.weebly.com/uploads/1/3/4/7/134759865/4acb2.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/51964256671.pdfIn PDF document text
    • http://nefupanono.mygamesonline.org/loan_affidavit_format.pdfIn PDF document text
    • https://rofixuninapo.weebly.com/uploads/1/3/5/3/135313709/8eb16.pdfIn PDF document text
    • http://shortsomfj.space/red_ball_1_cool_mathnewab.pdfIn PDF document text
    • https://cdn.sqhk.co/bamebuxi/B9if7XM/untouchables_tv_show_season_two_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/ximepadogi/fjjheAA/44868559368.pdfIn PDF document text
    • http://najetaxu.mygamesonline.org/ice_maker_not_filling_with_water_maytag.pdfIn PDF document text
    • http://medicinfo.online/70819316531ygjvg.pdfIn PDF document text
    • http://technodom11.com/marine_fish_equipment_uk063m1.pdfIn PDF document text
    • http://lopitimew.mygamesonline.org/16766798456.pdfIn PDF document text
    • http://zulesaxeririv.sportsontheweb.net/laporan_kasus_bronkitis_pada_anak.pdfIn PDF document text
    • https://cdn.sqhk.co/kagurase/gh8wygf/41554014914.pdfIn PDF document text
    • https://cdn.sqhk.co/pibegufuxova/zUghrhj/33029613972.pdfIn PDF document text
    • http://zugapuvu.mywebcommunity.org/molecular_hybridization_techniques.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mekofirudusem.rf.gd/zifavoreguwogif.pdfIn PDF document text
    • http://kisowadurodab.epizy.com/harry_potter_book_5_chapter_11.pdfIn PDF document text
    • http://tinejamuwaki.epizy.com/garigug.pdfIn PDF document text
    • http://viwapuzajor.epizy.com/3418671270.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_off00011ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD6 5100 bytes
SHA-256: 31166745bdf3c1e100732498604ad47d27638f21c9c27204358d794832dbe731
font_01_sfnt_off00012c42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C42 10472 bytes
SHA-256: 23f3e1bb9d5c1e87aaee34131a5197efb03a2cfa0adc8d04e75a23d5fff90970