Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c5fd220124cc9ec…

MALICIOUS

PDF

69.9 KB Created: 2020-12-24 22:18:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5d1cb0f2affd69e3c8df3e9ef9849622 SHA-1: 868203e81488a91cd2edfb70504ff2a0fb3677bd SHA-256: 0c5fd220124cc9ec32fbe2b79e8e3815a95c66160ad7c16614292199805e2e60
234 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains multiple links to external websites, including a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'free wifi calling app for Windows Phone'. The presence of a malicious redirector and the ML classifier's high confidence score indicate a strong likelihood of phishing or malware distribution. No scripts were extracted, but the PDF structure itself is being leveraged to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://ggtraff.ru/strik?utm_term=free+wifi+calling+app+for+windows+phone In PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/zozesonefoviz-ruraxawojuzetu-naler.pdfIn PDF document text
    • https://muxalogedidu.weebly.com/uploads/1/3/4/3/134358485/2618799.pdfIn PDF document text
    • https://dopuxaponaxu.weebly.com/uploads/1/3/2/6/132695391/paserarowubi.pdfIn PDF document text
    • https://gesunujas.weebly.com/uploads/1/3/4/5/134509411/4269818.pdfIn PDF document text
    • https://jaketomerinojox.weebly.com/uploads/1/3/4/1/134109184/nilivezerubiniboveli.pdfIn PDF document text
    • https://cdn.sqhk.co/dujujema/V8igghR/vaxaguz.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/ae9971d3-0347-4eee-9fd8-783875e179dc/woman_at_point_zero_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d907ce9-a6e8-40a7-af32-612da84009cd/jasorixeri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0228982-648b-40c1-9304-25bd3572015f/fixemuje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcc3b670-91c3-4833-ab74-43eb8f6b7d9d/naxukolosado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a114117-e8d0-4118-97d8-27a12aed7335/cold_steel_gi_tanto_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db118e68-a77e-4629-bbaa-e557c599285f/farawatolariror.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A5 5464 bytes
SHA-256: f288233011c047fcf3b53ba4da221df4cac2306b63f80202e66c5b287a6133f3
font_01_sfnt_off0000e44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44D 11428 bytes
SHA-256: 7cd4d02a430c86466a46b6621eae6b4efc62db02c7e02e4d08af571715f467d2

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