Malicious PDF — malware analysis report

Static analysis result for SHA-256 459164ddc0aafa0a…

MALICIOUS

PDF

74.2 KB Created: 2021-03-15 08:42:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 394e443fc6bedbc3b6972f5d7832d6ee SHA-1: 120f2e9c77efdf8c67f7abc4d389c878d210b77b SHA-256: 459164ddc0aafa0aaf3bfbb184f58643034051e849b3a391954c362077d4d4d2
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by multiple heuristics, including a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics specifically identified it as an advance-fee scam lure, using invisible links to suspicious domains to trick users. The presence of numerous external URIs and link farms further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://xajibur.ru/award?keyword=understanding+stock+market+for+dummies+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416154/normal_602bfcedb106a.pdfIn PDF document text
    • http://kafalukuwemi.mygamesonline.org/zadifixojixosawafixete.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412378/normal_604aee99c0659.pdfIn PDF document text
    • http://todayshop.website/mejirb4qzn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457590/normal_6023de9c5a809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479715/normal_6014b213de45c.pdfIn PDF document text
    • http://austritkfa.com/splash_lagoon_erie_pa_priceshbbmb.pdfIn PDF document text
    • http://witexodegimo.iblogger.org/hunger_games_1_libro_italiano.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/29126768105.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486566/normal_5fcd8e2396b47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423700/normal_603b25fa9447d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471985/normal_5fc6bcc68ecae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382618/normal_600d10a7a54f7.pdfIn PDF document text
    • http://ig-supportcenter.xyz/baby_boy_cute_photos76rcd.pdfIn PDF document text
    • http://rm-swis-mine.com/telecharger_film_useugel.pdfIn PDF document text
    • http://shtancircul.site/54060963373xu8i0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465397/normal_5fe50af4ea0f3.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/22811905672.pdfIn PDF document text
    • http://crispyset.online/65736634410jl7ys.pdfIn PDF document text
    • http://vaworudewu.iblogger.org/92037319959.pdfIn PDF document text
    • http://fullpisetc.ru/understanding_human_communication_13th_edition_by_adler_rodmanbk9qi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tikokowekujuw.epizy.com/bodyguard_tv_series_parents_guide.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_off0000e3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B4 5500 bytes
SHA-256: 5e8ed89ac3c392474fdf18b3e4f3e488a2e3c957cd695599a8ce6f45b391dde3
font_01_sfnt_off0000f662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF662 10828 bytes
SHA-256: 353420e686f10d07c2dd89701f3a49eed1501a4d7dd4f9ef83f2ef4eaecb0191