Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ae8102d002a7b4…

MALICIOUS

PDF

73.0 KB Created: 2020-11-11 02:47:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9513242ba508ab9da8eae05f922dab6b SHA-1: 7018c389d85986d008f071cf96b3801c2bae7dc0 SHA-256: c6ae8102d002a7b4186e540eee36cf1d257ecc5839324f66669a45d90ae68c45
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable hosting services and at least one known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lead users to phishing or malware distribution sites. The document body text is largely unreadable, but the presence of a URL related to 'phone cases' suggests a lure.

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://ggtraff.ru/strik?keyword=phone+cases+for+samsung+5 In PDF document text
    • https://sofusosixep.weebly.com/uploads/1/3/4/4/134493363/b0f44.pdfIn PDF document text
    • https://dujenavu.weebly.com/uploads/1/3/4/3/134366251/kusifozupis.pdfIn PDF document text
    • https://rebivawofud.weebly.com/uploads/1/3/4/3/134375894/waredi-tusixivatab.pdfIn PDF document text
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/03ebb52e3499506.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/6131267.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/be5e9cf252db664.pdfIn PDF document text
    • https://kotugelofamoxu.weebly.com/uploads/1/3/4/4/134403640/103769.pdfIn PDF document text
    • https://witudaki.weebly.com/uploads/1/3/4/3/134332653/4a3a19ebf37ce9.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
    • https://s3.amazonaws.com/luramamelolem/scoutmaster_conference_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6df3172c-d81a-4893-8b88-a2839ad1f777/21096437690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c2d3776-3390-4f37-a989-c498b66b9f08/26937073429.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32631f3d-a984-4a46-8b75-b127646284b0/birobubabetimuwid.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/datilil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7c269b4-0fe9-466d-b8e8-039b00e9b58f/convert_to_youtube_video.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B2 5144 bytes
SHA-256: b936bd0209dd34feb2498e0fa4fd955f8080ea74441e44d4c3b22120dcac17e4
font_01_sfnt_off0000e5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FB 10360 bytes
SHA-256: 3e4af78381dee983b2d3f1d25aec4a9afc21e3e2e0c36e69554e1824b06964de
font_02_sfnt_off0001094a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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