Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c4952acb4d30bd5…

MALICIOUS

PDF

74.5 KB Created: 2020-11-29 22:57:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b8bfcf3a8b88aa0883b22b5714297cba SHA-1: be56b228b0c3aafcebde5db173649b5a9ffb4ca1 SHA-256: 7c4952acb4d30bd5ae834d6253e7b64633ce388b90e89ca1a0ca6f9e5eb5e27e
244 Risk Score

Malware Insights

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

This PDF file contains numerous links designed to redirect users to a link farm, ultimately leading to malicious content. The primary lure appears to be related to "cash rewards apps," as indicated by the URL parameters. The PDF structure and embedded links strongly suggest a phishing or scamming attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/aws?utm_term=cash+rewards+app In PDF document text
    • https://kirasupi.weebly.com/uploads/1/3/4/4/134442552/purik-wonaganilumu-mikefegulepe-luvokigej.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/5cb32b3a7f.pdfIn PDF document text
    • https://gejuvidafi.weebly.com/uploads/1/3/4/4/134456396/73c7dc7aed3db1.pdfIn PDF document text
    • https://welofubevi.weebly.com/uploads/1/3/1/8/131856084/7584186.pdfIn PDF document text
    • https://disadoxamegipu.weebly.com/uploads/1/3/4/5/134527150/wezag.pdfIn PDF document text
    • https://sizojupitad.weebly.com/uploads/1/3/4/3/134332657/4d3418a41a.pdfIn PDF document text
    • https://rizowexerezo.weebly.com/uploads/1/3/4/2/134265486/kijonutikutapepanide.pdfIn PDF document text
    • https://didilajuti.weebly.com/uploads/1/3/4/5/134585724/1255376.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/b0cf8.pdfIn PDF document text
    • https://lugemubijovige.weebly.com/uploads/1/3/4/8/134879604/9036456.pdfIn PDF document text
    • https://teraxumafelenug.weebly.com/uploads/1/3/4/7/134747654/putofazetoteduf.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/2568472.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/wujixus/13497233530.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/risikaf.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/ghost_of_john.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA7 4572 bytes
SHA-256: be99b8a43c7fd4f669fb96de22462aee4f45a2eb26846359435386db988171c5
font_01_sfnt_off0000ea48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA48 10832 bytes
SHA-256: a6298f8592cf6ff0dbf8786c6665317e2fadf85f443861ac8fae80727ca90fe2
font_02_sfnt_off00010f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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