Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b03f04801e3c343…

MALICIOUS

PDF

72.0 KB Created: 2021-03-31 00:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7b5775da76e16c7970bedc8e39b13555 SHA-1: 514192b79c1c2bc41e10f012a97c15ad05a3d642 SHA-256: 3b03f04801e3c3439d0581b7299ebb204e627d307ed32e1c167ac45edafd431c
166 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing lure. It contains numerous links, some of which are invisible, pointing to suspicious domains. The document's content, though heavily obfuscated, appears to be a lure for free items, a common tactic in phishing campaigns. The presence of multiple external URIs and the ML classifier's high confidence score indicate a strong likelihood of malicious intent, likely involving the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://lozipotod.ru/wix?keyword=how+to+get+free+star+coins+2020+july PDF link annotation
    • http://tukiviretek.iblogger.org/jerry_kuhnhausen_obituary.pdfIn PDF document text
    • http://retys.fun/basketball_court_diagramsf1yr3.pdfIn PDF document text
    • http://securitycheckingbrowservkcom.xyz/warhammer_40k_codex_8th_edition_downloadrwx0h.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/dJgdZXF/kong_classic_dog_toy_medium.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406463/normal_600be9319ec10.pdfIn PDF document text
    • https://cdn.sqhk.co/kevekelobivo/EjgOzVM/valentine_cake_decorations.pdfIn PDF document text
    • http://digogipexoluku.iblogger.org/90600820721.pdfIn PDF document text
    • http://tinonijo.iblogger.org/how_to_play_all_factions_in_medieval_2_total_war.pdfIn PDF document text
    • https://cdn.sqhk.co/gisatajofo/ahiVESr/adidas_performance_ultraboost_19_x_star_wars.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492900/normal_6019873cbaad3.pdfIn PDF document text
    • http://3203epworthcres.com/stokke_tripp_trapp_newborn_set_manualtk93v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475208/normal_5ff7c73d54e6f.pdfIn PDF document text
    • https://cdn.sqhk.co/suwuwewazaka/Chehbgh/tijefe.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/Qq1he0Y/drawing_a_circle_around_crossword_clue.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458631/normal_604c98abc3965.pdfIn PDF document text
    • http://about-fb-support.com/kejelawan5nms4.pdfIn PDF document text
    • http://ketosimple.online/why_wont_my_oven_workj4t2l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xotepugiz.rf.gd/98460615102.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee1e528d-e398-45f0-ade0-5e6a6dbecf05/76380900966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0360db66-2a79-4fdb-9f01-b6fc2a8c81c5/cub_cadet_2166_deck_belt_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21d8c6a8-1da0-4a25-823b-54d607646527/harbor_breeze_fan_with_remote_installation.pdfIn PDF document text
    • http://kibiviridox.epizy.com/tilud.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_off0000da85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA85 5556 bytes
SHA-256: 19085d306d0c15bc20ac41e0f61209313e9e3a604db816f72f1904d7e5e5dd62
font_01_sfnt_off0000ed9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9F 10736 bytes
SHA-256: deccf6d9df0cb90213dc6354edfa06a14aca5a10b0bf31fa4fed66124a8eed1a