Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c0fd90a00eea66f…

MALICIOUS

PDF

78.9 KB Created: 2021-03-28 01:30:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 01f2c7e7e19a6ccb9e4762704f85a9ee SHA-1: 905c62e06667b6ea694b8b6c1e9e8057667a0738 SHA-256: 0c0fd90a00eea66f75104c783b1164ba5b44076a2eb8bc507eee2782a68803d4
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm with numerous external URLs, including one pointing to 'mezovuduw.ru', suggesting a lure to a malicious site. The PDF structure and embedded links are indicative of an attempt to redirect users to potentially harmful content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://mezovuduw.ru/award?keyword=acceptance+letter+for+school+pdf PDF link annotation
    • https://boliminukedakos.weebly.com/uploads/1/3/4/4/134494229/muzagirig-fakuw-zojixerub.pdfIn PDF document text
    • https://tufanemoxidubux.weebly.com/uploads/1/3/4/3/134315727/lefosinukewixujawuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380380/normal_6032cfc1c492b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490961/normal_6044df32e2edb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498971/normal_5fca8f5f5c72e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372086/normal_6056dfb812d2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377403/normal_605c1020c6694.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389358/normal_6054627031e34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410956/normal_6059fbe9a4247.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366630/normal_5fc86638c5595.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406820/normal_603bf2f96f7e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372967/normal_5fcc5cd1bbea4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477637/normal_60470d545c5c3.pdfIn PDF document text
    • https://rogefiraf.weebly.com/uploads/1/3/4/5/134581109/biwomigufugenu-kamixapamesove.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426812/normal_60320e70b4673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370543/normal_603a1f2f3f4e7.pdfIn PDF document text
    • https://pexajutamog.weebly.com/uploads/1/3/4/7/134759810/1476649340d0.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/mubefula/53229852475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acff2c2d-23c3-43f5-894d-dd9168b9aa42/what_is_chicago_style_citation_example.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/diy_aeroponics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8dcb799-9f6d-499b-82e9-22c7b7f7b11f/paslode_f350s_wont_fire.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/47227295928.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/aha_hypothermia_guidelines_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/sobureligafe.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_off0000f828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF828 5232 bytes
SHA-256: 7d031cbcba9e40c09001789544643db22bafed5082216a979a41da9c57ee9f98
font_01_sfnt_off000109f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F0 10812 bytes
SHA-256: 6777cb44424d2eaa16da86c6b07cb16e784d3c9b32cd3282b4cd84b4c271544e