Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2036059a853672…

MALICIOUS

PDF

79.0 KB Created: 2021-06-07 17:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3f847504799bdb5e49ade4c4547196f6 SHA-1: e46cc8abcbba24bf223faf66b91921af95d2ec85 SHA-256: 6d2036059a853672425328b9086b2084901197073a4dad95c269ed9a0840f177
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one at `https://queure.ru/pbw?utm_term=bitmain+antminer+s9+hash+board+repair+guide+with+schematics` being particularly suspicious due to its UTM parameters and potentially deceptive content. The document's structure and the presence of many links suggest it functions as a link farm designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://queure.ru/pbw?utm_term=bitmain+antminer+s9+hash+board+repair+guide+with+schematics PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luwapoveduvi.pbworks.com/w/file/fetch/144660273/pixel_art_photoshop_cs5_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1630d686-77d5-4f8e-b04d-9a59c1b454f6/can_a_14_year_old_work_at_baskin_robbins.pdfIn PDF document text
    • http://jivevisubido.pbworks.com/w/file/fetch/144670395/fundamentals_of_nursing_the_art_and_science_of_person-centered_nursing_care_8th_edition.pdfIn PDF document text
    • http://lulatigono.pbworks.com/f/market_leader_pre-intermediate_third_edition.pdfIn PDF document text
    • http://gepefupugalu.pbworks.com/w/file/fetch/144509850/how_do_you_report_stock_earnings_on_taxes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dcc5c8f-3d07-4272-877b-618ecace4467/73428519243.pdfIn PDF document text
    • http://kuperuxowix.pbworks.com/w/file/fetch/144539553/bimitimomaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c607d3fe-281d-40ff-a0f0-8ae6c4cae1e1/88516442756.pdfIn PDF document text
    • http://sawebaz.pbworks.com/f/20013858116.pdfIn PDF document text
    • http://fatakalewene.pbworks.com/f/what_is_the_boiling_point_of_element_113.pdfIn PDF document text
    • http://pijipusap.pbworks.com/w/file/fetch/144620163/diwerapitadodojobapofiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd77141e-9e5c-4423-9836-4a4ea6a356bf/human_anatomy_and_physiology_lab_manual_13th_edition_answer_key.pdfIn PDF document text
    • http://nadisizaze.pbworks.com/f/82202747894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d38c06ab-1893-4b1e-be53-33a0ccc6f4f4/41541108453.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56282ed0-f11c-42f0-b2f7-a4de5c79f68e/bivanupefakuwuximoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/942410f6-aa15-44fe-8db2-d224b85b441b/24975623794.pdfIn PDF document text
    • http://kepigiwup.pbworks.com/f/ide_ata_atapi_controllers_missing_windows_10.pdfIn PDF document text
    • http://vafobotigef.pbworks.com/w/file/fetch/144528078/48011695231.pdfIn PDF document text
    • http://pokatufaxi.pbworks.com/f/lijagaras.pdfIn PDF document text
    • http://zemenifinabe.pbworks.com/f/96352728075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7b39d7b-2368-4001-a0ed-f1d6272ca221/46777326483.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c97e822-cae2-48ff-857a-29f49831fc2a/farewell_to_manzanar_chapter_3.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_off0000f5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EA 5892 bytes
SHA-256: 34114b547ffeb4115cb4df767e924ae2b259d1c981fe73f7ff17670cd1f28ead
font_01_sfnt_off000109cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CC 10772 bytes
SHA-256: 95d7acf9f7aa5ef8cb4f8dde9e2ad86114b94b602fb2e957090d40796c665f3c