Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ccb837b9084a2e6…

MALICIOUS

PDF

71.7 KB Created: 2021-02-20 10:30:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a7ce7cd72e9d1f8f9db4a20bf182d1b0 SHA-1: d7f5b33f5b55a57a5de07b57bf771fb0609f684b SHA-256: 0ccb837b9084a2e67ed7ccfcdc0f89d7bc14590fd56d4091c70f2e3b246909ef
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=nikon+f3+af+manual In PDF document text
    • http://lnstagram-blue-badge-form.com/toca_mystery_house_free2pwg4.pdfIn PDF document text
    • http://itrom.fun/47771891469wsmcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413983/normal_6016a8d3b78e3.pdfIn PDF document text
    • http://skywonder.space/4857825520tpukf.pdfIn PDF document text
    • http://bluebadgeapproval.com/95191848075tpxot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417037/normal_601d61399af9f.pdfIn PDF document text
    • http://reduslimitalia-official.site/41356392342owfdq.pdfIn PDF document text
    • https://lugumeduzox.weebly.com/uploads/1/3/0/7/130740149/7515965.pdfIn PDF document text
    • http://manthoughtswebsite.website/17370708836wloxb.pdfIn PDF document text
    • https://wikifepum.weebly.com/uploads/1/3/3/9/133986434/6ec2f182.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477138/normal_5fd9a4782abe5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392661/normal_601712b2657a3.pdfIn PDF document text
    • https://betetudiju.weebly.com/uploads/1/3/5/3/135348010/pejeduke-pulumurezifataz-korifegizukimik.pdfIn PDF document text
    • http://mstmail.space/251691436555hbz6.pdfIn PDF document text
    • http://bestpriceforukraine.xyz/android_developer_options_mock_location_apphy7ai.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471252/normal_5fe54e85005cd.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://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_off0000cefe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFE 4520 bytes
SHA-256: 61f294a8cc9ade7c688ccce9cd8b451f260547573c16065313787c24d9ade85b
font_01_sfnt_off0000de3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3B 11128 bytes
SHA-256: 444718dc9170f57bbdcffb90ac545eff5f8e665d7be4e36ee06cc85931e484c0
font_02_sfnt_off0001042f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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