Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cd09f3c92dceb97…

MALICIOUS

PDF

80.2 KB Created: 2021-03-14 19:52:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 4dc92352986d945cc09319e3b227cb9c SHA-1: 5741737522810abf140322c0fe21771f064ce206 SHA-256: 0cd09f3c92dceb9715ce6dd298d90162b37cd5b28483100e48f5e7ca240f5912
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated and point to potentially malicious content, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this file as malicious, suggesting it is designed to redirect users to phishing or malware sites. No scripts were extracted, but the presence of numerous external links implies an attempt to lead the user to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://druttle.ru/wix?keyword=2011+fj+cruiser+owners+manual PDF link annotation
    • https://kiniwotonupit.weebly.com/uploads/1/3/0/7/130776343/9ed6e7b.pdfIn PDF document text
    • https://dojepojejexun.weebly.com/uploads/1/3/4/6/134668276/dokefo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446774/normal_601a5a6882dac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381541/normal_60086c584030d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415051/normal_5fdc0e0ed522a.pdfIn PDF document text
    • https://gixebodaloru.weebly.com/uploads/1/3/1/3/131379223/zafopobaderagob_lemaxetugapanom_xukotamew_dobukopinirob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453900/normal_603350d45097f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489255/normal_604067d271aee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465012/normal_5fdf007b993d2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/069821d6-323a-4786-bd20-67ce2b1a7ba2/mimokusobujoxarawido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc70ab7e-7110-41da-bdba-c474284ebd86/how_long_do_you_cook_a_brisket_in_a_masterbuilt_electric_smoker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7b2f32b-7d84-427e-8f59-cc3306b6e3d0/87709307042.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/chalo_movie_ringtones_for_mobile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a99670c-3430-434d-a7b6-415524edb968/66734025263.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/nidobawak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e36518f3-f096-4f4a-b950-34a0b86f6e72/is_danby_a_good_freezer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b939348-cac2-40b0-af49-c9952d87661e/318-14_building_code_requirements_for_structural_concrete_and_commentary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/486fe17d-15c0-4d94-b6d2-a2bfdb4b4c16/solid_state_physics_download.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_off0000f8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B9 5424 bytes
SHA-256: 8476e8aa20b8b36905148598ddf36d651a6f22fc1d79b6c25e020c1c18d93350
font_01_sfnt_off00010b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B31 11828 bytes
SHA-256: 4935d0ac83b9c09468fbc15edc575786afd636049d76693c2cdd57df21cfb536

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