Malicious PDF — malware analysis report

Static analysis result for SHA-256 af00410eb02861eb…

MALICIOUS

PDF

108.5 KB Created: 2021-03-22 22:09:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: cb3330cb0d1378e941b5840d5102e567 SHA-1: 192942afda17cc6eba647e2998d8fd1be7a07343 SHA-256: af00410eb02861eb27ebb0cd1898074444e1a522236f5ec04e953da820f2b006
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/award?keyword=command+prompt+codes+windows+7+pdf PDF link annotation
    • https://nubiduxabegi.weebly.com/uploads/1/3/1/8/131871606/lumeg.pdfIn PDF document text
    • https://cdn.sqhk.co/nedupugifuka/ibjigeK/planet_sandbox_games.pdfIn PDF document text
    • https://cdn.sqhk.co/dudilabatod/hlAy1iR/pugasogefot.pdfIn PDF document text
    • http://moneyindia.site/conair_hair_trimmer_parts7vknv.pdfIn PDF document text
    • https://cdn.sqhk.co/metevetufi/gghcbje/checkers_game_rules_double_jump.pdfIn PDF document text
    • https://cdn.sqhk.co/luzeginu/ijimZhg/expense_budget_template.pdfIn PDF document text
    • http://brightshopbg.xyz/ms_project_tutorial_free_downloaddlxan.pdfIn PDF document text
    • https://wojatobarub.weebly.com/uploads/1/3/4/6/134612389/zivolujuterumivobiz.pdfIn PDF document text
    • https://cdn.sqhk.co/muzedikerum/RgcheSh/pepiwir.pdfIn PDF document text
    • http://lightstart.xyz/pekimijeralerapobun829rx.pdfIn PDF document text
    • http://jijimaxugixu.22web.org/first_10_amendments.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/cfDjXja/51721809292.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/nRgchin/2020_land_rover_defender_review.pdfIn PDF document text
    • https://nepuxobim.weebly.com/uploads/1/3/5/3/135304691/4157062.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://konugatevokaxot.epizy.com/reflection_mulan_viola_sheet_music.pdfIn PDF document text
    • http://genenapukiral.epizy.com/how_to_reset_voltas_window_ac.pdfIn PDF document text
    • http://kinuzana.rf.gd/addition_word_problems_for_grade_1_worksheets.pdfIn PDF document text
    • http://tafaredos.rf.gd/grade_8_ncert_maths_textbook.pdfIn PDF document text
    • http://lovenewaw.rf.gd/61905544853.pdfIn PDF document text
    • http://vovajixavago.epizy.com/pavadano.pdfIn PDF document text
    • http://mevedokepovi.epizy.com/aksum_kingdom.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_off00015ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CE9 5252 bytes
SHA-256: c91c03136f29ecdca03ada206552a2e96034ba07fcbb50e5f0e3017d5cf8e3f5
font_01_sfnt_off00016ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EBF 11640 bytes
SHA-256: e2f51bc40b2fa45648a98976342336586324d722d2c95cf68a3df4f3f55902f5
font_02_sfnt_off00019641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19641 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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