Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f78484218ffba1…

MALICIOUS

PDF

70.5 KB Created: 2020-12-16 04:11:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: faabd810017ffd10b921da60eae9ef24 SHA-1: 7bcdcfa74e6a94c244a7c6b287eac0d6583fecc0 SHA-256: f0f78484218ffba1acf4ea29d78e2f31815e9035ea3c4cc561006cc90bd27ac9
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics and an ML classifier, specifically flagged as a phishing/trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://trafftec.ru/aws?utm_term=android+tv+box+x88+max+9.+0', appears to be a lure for a specific product, potentially to disguise malicious intent.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/aws?utm_term=android+tv+box+x88+max+9.+0 PDF link annotation
    • https://kirimanadawa.weebly.com/uploads/1/3/4/3/134383910/lenoboso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467612/normal_5fbb2bb96a69b.pdfIn PDF document text
    • https://ritipovilij.weebly.com/uploads/1/3/4/6/134650849/d68c0.pdfIn PDF document text
    • https://bakurisevujukuj.weebly.com/uploads/1/3/4/3/134368754/domivuzuju-xoriwufun-dizawipo.pdfIn PDF document text
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/zizufupifafu.pdfIn PDF document text
    • https://jitolubupiloz.weebly.com/uploads/1/3/4/6/134637312/4478357.pdfIn PDF document text
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/jezezojubodam_xobed_jirixonif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377905/normal_5f91fb302f304.pdfIn PDF document text
    • https://finijuzado.weebly.com/uploads/1/3/4/4/134444754/7756246.pdfIn PDF document text
    • https://fategebedabeno.weebly.com/uploads/1/3/4/7/134718848/lanezo_xusuxuguwikati_raroviz.pdfIn PDF document text
    • https://zasuzepomuban.weebly.com/uploads/1/3/4/6/134627511/992711.pdfIn PDF document text
    • https://tisatazufewuvo.weebly.com/uploads/1/3/1/1/131163687/a376ee.pdfIn PDF document text
    • https://xiduxerajul.weebly.com/uploads/1/3/4/6/134696605/bdee66.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0c3aad26ff1194f72fc70/t/5fc19ae0fa04221c715bfb24/1606523617405/weakauras_beginner_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd307b7887db0c57500199/1606234242705/66005053376.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/10236136698.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B2 5540 bytes
SHA-256: 8e7785fc0f8db668d163fa66fc6cac42ca9de9a4e8dfac71e858459e42bc7f3d
font_01_sfnt_off0000e87f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87F 10868 bytes
SHA-256: ed127ac1b0c69c1d4c9187cc00f3db060436b88944f4d5c5e7dff86310ab7eb3

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