Malicious PDF — malware analysis report

Static analysis result for SHA-256 8424491dc91e44f9…

MALICIOUS

PDF

84.4 KB Created: 2021-03-17 20:33:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: aa0dd46ed1e3c4a96e6b794a586e0b2a SHA-1: a9931af8590f74b1e618476eb5df88dfcde60a3d SHA-256: 8424491dc91e44f97c8aff2ea5fab0a8653304660a02b4cb12f787a07fcb7393
126 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'San Andreas apk cheat' and embeds multiple URLs, one of which is identified as a potential phishing or malicious link. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://bologen.ru/wix?keyword=san+andreas+apk+cheat PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427506/normal_60356dc8dc21f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490133/normal_60105e9cd9799.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379217/normal_5fec8dc25fed2.pdfIn PDF document text
    • https://vusuvorolom.weebly.com/uploads/1/3/4/5/134501440/6666030.pdfIn PDF document text
    • http://bcpreactiva-enlinea.com/when_should_you_change_transmission_fluid_on_2018_honda_accord0vdj0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390641/normal_6002daa2a0b54.pdfIn PDF document text
    • http://kvrovk.xyz/how_often_transmission_fluid_changep2kw2.pdfIn PDF document text
    • http://aycotoro6.xyz/jatodobuoman.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469103/normal_602b839791d52.pdfIn PDF document text
    • http://8bitbeardsco.com/arbys_waffle_fries_nutrition_factsomgsh.pdfIn PDF document text
    • https://sulogifobib.weebly.com/uploads/1/3/5/3/135322722/vazabajutigilitijaw.pdfIn PDF document text
    • https://lipijunozawisek.weebly.com/uploads/1/3/4/7/134721324/zubopozinovibov.pdfIn PDF document text
    • http://doucheop.xyz/youre_in_charge_memesywqb.pdfIn PDF document text
    • http://olymptrade.buzz/directv_wireless_genie_mini_flashing_red_lightklf8t.pdfIn PDF document text
    • https://pimizotola.weebly.com/uploads/1/3/4/7/134770615/lesopofezew.pdfIn PDF document text
    • https://xolipesu.weebly.com/uploads/1/3/4/6/134672505/jinopatugubixi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479236/normal_6006d9ad20ffe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484834/normal_5fdc81204fa64.pdfIn PDF document text
    • http://casser.xyz/79833807106vdmkr.pdfIn PDF document text
    • http://byseles.xyz/game_coding_complete_4th_editionx9djz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463275/normal_602e1095c3014.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_33b8a58b6db44d48bf4445582a31c7b4.pdf?index=trueIn PDF document text
    • https://181f3bdf-810f-4c34-abb3-9f3362228cd6.filesusr.com/ugd/30415f_8f618a032eea45c1b4abf5d9a54f9108.pdf?index=trueIn PDF document text
    • https://814cba0f-f649-4223-bfe6-7884e6e02b9d.filesusr.com/ugd/c1108c_e32b9f12b6c44645a73cdfd6e20d180f.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33A 4928 bytes
SHA-256: 753bd493338a1f509654cf632b16bf230243baab86b4990db00c9ebba232777b
font_01_sfnt_off000103df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DF 22580 bytes
SHA-256: 246b81b02f571ee07b204e7500d54b43c78f8b65a6cbd86795ad2725845e38a1
font_02_sfnt_off00013477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13477 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e