Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b2a10c62a46696…

MALICIOUS

PDF

68.3 KB Created: 2021-01-17 00:02:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6a4b608d289ef0a6771e0a1478c1a1af SHA-1: 63a21397714de4c3271771a0e6799f10321b579a SHA-256: 18b2a10c62a46696fd5bb3aacb17fef81b0a6c86de9872187ba1eef191699fd5
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, and contains numerous links to external sites, including a known malicious redirector. The heuristic firings indicate it is a link farm designed to direct users to potentially harmful content. While no scripts were extracted, the embedded URLs and link farm structure suggest an attempt to lead users to phishing or malware distribution sites.

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://traffine.ru/123?utm_term=jolly+jump+inflatables+columbus+ga In PDF document text
    • https://site-1176958.mozfiles.com/files/1176958/22515255100.pdfIn PDF document text
    • https://site-1252473.mozfiles.com/files/1252473/annotation_edit_mac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461780/normal_5fcfec113a512.pdfIn PDF document text
    • https://site-1176264.mozfiles.com/files/1176264/gegawivojuwodizaxukevon.pdfIn PDF document text
    • https://site-1178820.mozfiles.com/files/1178820/wibalagezar.pdfIn PDF document text
    • https://site-1253944.mozfiles.com/files/1253944/subonuwelufikudoz.pdfIn PDF document text
    • https://fukuperuka.weebly.com/uploads/1/3/4/8/134883813/jedololafemim.pdfIn PDF document text
    • https://kubinivoboduwu.weebly.com/uploads/1/3/4/6/134601548/zirureg-dejelam-mivipogege.pdfIn PDF document text
    • https://tebefatudu.weebly.com/uploads/1/3/4/3/134329870/tupelanod_janixiwadajug_fadazabobip.pdfIn PDF document text
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/texozop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449184/normal_5fdc81ee840fb.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/ludimoze.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/radubozufiwo/beautiful_forest_background_images.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/53317857289.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/rusirofifamuwemoze.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_off0000c244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC244 5428 bytes
SHA-256: 735ccab4f1fdcf115a49ebbc325e9b27824956fc41a3e55ff06c1041b5c2e7a0
font_01_sfnt_off0000d4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C1 9724 bytes
SHA-256: c39eb7c78a94bf26f074b1769e262bee7c40f30762e01e205ade7ae92df660bf
font_02_sfnt_off0000f610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF610 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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