Malicious PDF — malware analysis report

Static analysis result for SHA-256 907163102c96439e…

MALICIOUS

PDF

73.6 KB Created: 2021-03-18 13:39:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5306ec88cdd0d518b4956604ac6da150 SHA-1: ad76cca1b05ca929f309214a62517cf0ae2e2dfd SHA-256: 907163102c96439ed1d1d566ec07a6b232202b2031d4f539d675bd7e30cb6f08
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one specifically pointing to a URL that appears to be a keyword-based redirector for an APK download. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/wix?keyword=dc+unchained+apk+mirror PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386081/normal_602f5fb95a856.pdfIn PDF document text
    • http://xoxapepagaxon.mypressonline.com/guerrero_de_oracion_stormie_omartian_gratis.pdfIn PDF document text
    • http://gagefiwirimat.medianewsonline.com/muwolojelemofuputubo.pdfIn PDF document text
    • https://cdn.sqhk.co/wizevomorofe/hb4idjf/sushi_catering_san_diego.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450415/normal_5ff040a2c1363.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/8bgeVK4/door_slammers_1_mod.pdfIn PDF document text
    • http://sozapemogoz.mygamesonline.org/nursing_theories_and_their_work_9th_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/momugutatok/q1gdjfV/bowl_faster_exercises.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466673/normal_600a3b172d3d3.pdfIn PDF document text
    • https://cdn.sqhk.co/rokijatu/hNhehjC/exion_hill_racing_game_level_29.pdfIn PDF document text
    • http://fibisazorowax.mypressonline.com/xexusuzokugemotazat.pdfIn PDF document text
    • http://vurovolapoza.mygamesonline.org/auto_repair_near_me_now.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9e2b3e3a-6a02-4d3b-8ba9-5acc01041672.filesusr.com/ugd/66c878_7c8697f862b04459ad6a9755231994be.pdf?index=trueIn PDF document text
    • https://c1cb471f-fc5c-4ef2-b3e1-4d0d0d09d135.filesusr.com/ugd/cc5b41_8315deafabab49a79931cfb84026e353.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/46240315-da29-4b81-9136-e1c138c8a8f9/does_lexus_rx_350_have_a_cvt_transmission.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9222079-a6f0-4c05-ac29-8c1c56486823/51688684977.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f26ce21e-017d-4602-9dff-f31f02ebe5d0/harry_potter_ebooks_free_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc64d49d-adca-49d0-917e-8ebaa4d08347/31910658838.pdfIn PDF document text
    • https://c8019651-2137-4367-b38e-775fff3f8a75.filesusr.com/ugd/fc5a02_cf87a374df314798a261f64ce3cbe1f5.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29E 5168 bytes
SHA-256: e6f473d8569afb89044c666e845be27bb7d9a2dd685dc3adc29c329f4d4fa2e0
font_01_sfnt_off0000f40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40B 10984 bytes
SHA-256: 24cf6fba74e6b74608c751af8c425aeed551cb685811c82470dfeade50367981

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