Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea34924f046e437…

MALICIOUS

PDF

70.6 KB Created: 2021-02-07 04:54:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4f6a78bf7ec070f305b58c0f5793e42a SHA-1: b3fd7cd15a5e38585c5c8296e936a0a789e20cad SHA-256: 8ea34924f046e4378fc4fed36dda22f0f9d016926c6f0a70ee7c889e20f039b4
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, contains references to 'Digital lux meter ms6612' and 'wkhtmltopdf', which appear to be lures to disguise the malicious nature of the document and its embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/123?utm_term=digital+lux+meter+ms6612 PDF link annotation
    • https://cdn.sqhk.co/xubuguxovim/eMghBic/mineral_exploration_project_management.pdfIn PDF document text
    • https://nogalagamepet.weebly.com/uploads/1/3/0/7/130738620/rokelore_wosit_koxofopixaxu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496607/normal_5ff5c779c2fc1.pdfIn PDF document text
    • https://zabidikigez.weebly.com/uploads/1/3/4/5/134594795/9206508.pdfIn PDF document text
    • https://sepiximefajo.weebly.com/uploads/1/3/4/8/134849953/3188404.pdfIn PDF document text
    • http://jolowenifar.iblogger.org/bhojpuri_film_video_song_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/tKy34ja/pokemon_detective_pikachu_movie_trailer_2.pdfIn PDF document text
    • https://jewefero.weebly.com/uploads/1/3/1/3/131383264/794f01.pdfIn PDF document text
    • http://crubr.space/language_proof_and_logic_2nd_edition_solution_manualhxwl2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470389/normal_5fc92579da0f1.pdfIn PDF document text
    • https://nobewiga.weebly.com/uploads/1/3/5/3/135315034/1366037.pdfIn PDF document text
    • http://medyahanem.com/butuwezawuxazee6hzs.pdfIn PDF document text
    • https://cdn.sqhk.co/gutemokerezo/jjguphj/drift_racing_cars_for_sale_south_africa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485010/normal_5ff23f581c69f.pdfIn PDF document text
    • https://fularoxu.weebly.com/uploads/1/3/1/4/131452806/jetovupenunujef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456998/normal_600a1f998ea2f.pdfIn PDF document text
    • https://bozuwosumexoxal.weebly.com/uploads/1/3/2/6/132682772/xomadowux_vedakazejelemu_duvozipojazar_jewokul.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
    • http://jizuwugi.rf.gd/catholic_answers_confession_to_a_priest.pdfIn PDF document text
    • http://sojizodujibibo.epizy.com/android_emulator_portable.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC92C 5076 bytes
SHA-256: f0b047e27698c5665ada27ac9caf13cc444ae049e9f7bcd9b682652172c1554e
font_01_sfnt_off0000da82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA82 10640 bytes
SHA-256: 51f7bae796c920a35549f54794c3dd48c2b3208e9e689472d46804e26249ddb2
font_02_sfnt_off0000ff0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f