Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e27f51fa4a102e5…

MALICIOUS

PDF

79.0 KB Created: 2021-03-21 05:29:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: fdf4dd1f319367f5ba4a91fecf217260 SHA-1: f175f5d158f5e1518c532bdb92b30f74e0b8d0e5 SHA-256: 4e27f51fa4a102e58bc075b7cc86d3e7bf8ce928e65c604e6fc6ef7246fe107e
206 Risk Score

Malware Insights

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

The PDF contains numerous external links, including one pointing to 'pelibifir.ru' with a query parameter suggesting a reset of a rooted Android phone, indicating a phishing or malware lure. The presence of a large number of external links, many on disposable hosting, and a critical ClamAV detection for 'Pdf.Phishing.Trojan' strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to deliver malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://pelibifir.ru/123?utm_term=reset+rooted+android+phone PDF link annotation
    • https://riwusivi.weebly.com/uploads/1/3/4/9/134900433/bojus.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/hheLFhb/pabejivapojedetubaf.pdfIn PDF document text
    • https://cdn.sqhk.co/reserujaj/SEvP3Nt/fodaxaguradu.pdfIn PDF document text
    • https://limotesatax.weebly.com/uploads/1/3/1/8/131871768/zokolakase.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/ibhmhhR/burgerology_patchogue_brunch_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/kidurukazag/B05geZc/62499598559.pdfIn PDF document text
    • https://cdn.sqhk.co/neliwuwo/hcKs8sZ/99973099325.pdfIn PDF document text
    • https://cdn.sqhk.co/xefilelo/jcix6vF/weeds_cast_season_5_episode_8.pdfIn PDF document text
    • https://cdn.sqhk.co/lonuxonemor/ibhclSK/plague_inc_board_game_scenario_strategy.pdfIn PDF document text
    • https://cdn.sqhk.co/kewusikata/cRihcgf/nojadodijefiwopepimop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/nakadososulezupiwuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4fe2549-0191-4225-b988-b475d8bf8bb7/80117669334.pdfIn PDF document text
    • https://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_5612d8fa66f44c21b04f56f6d3e7a7eb.pdf?index=trueIn PDF document text
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_1dd22b8c80454eaeb8a3c18dd410dcbe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/852c6bcc-25c5-4518-b9ca-ce8aa748c7e2/wawogesubiwuso.pdfIn PDF document text
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_80cc62f181d24f8585629f4bb52849a3.pdf?index=trueIn PDF document text
    • https://e5720c39-3c1c-4a52-9be9-509675281b5a.filesusr.com/ugd/0010c8_a720c7f9a6604680ab614da9a3b67cee.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d04b3a41-ff17-4eed-adab-92eb0c49491c/systems_engineering_salary_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/construction_project_risk_management_plan_template.pdfIn PDF document text
    • https://45ed8376-e832-497f-ab20-0a31924dc5db.filesusr.com/ugd/4b7290_01e14ece75e34cb9a0f57ca99116f25d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/258c74a4-e74a-4e23-b787-b10074901f1c/lenisewulopixomolipev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/059a9bec-f4ba-4091-adf3-02b88786c72d/plantronics_m180_universal_noise_cancelling_wireless_bluetooth_headset_manual.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_off0000f8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A2 5024 bytes
SHA-256: dabcba6eb43d88c84aee3de23c8eeca5b80a1d583084f7a05a24280cc6347415
font_01_sfnt_off000109b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B0 10820 bytes
SHA-256: b666b07747eb90f8fdc5024a110c00f64125597b0e5ddf9acc0f3936b9982afc

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