Malicious PDF — malware analysis report

Static analysis result for SHA-256 1649df8041b62d1f…

MALICIOUS

PDF

79.2 KB Created: 2020-11-21 23:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c095d3cf8c624a619f961f33da23e532 SHA-1: f045f4b116c49da534bb47371b5859f17cf6c473 SHA-256: 1649df8041b62d1fd1c9a976ee22ee954821b312dd78b4099f13c2a03f2a7f15
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, and contains multiple links to external websites. One critical heuristic identified a link to known malicious redirector infrastructure, and another noted the presence of a link farm with 30 external PDF links. The document body contains garbled text and a reference to 'bdo shai awakening weapon upgrade', suggesting a lure for users interested in that topic.

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=bdo+shai+awakening+weapon+upgrade In PDF document text
    • https://cdn-cms.f-static.net/uploads/4479938/normal_5fa64b424150f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375531/normal_5f9bd2c3ba81c.pdfIn PDF document text
    • https://kosemarenile.weebly.com/uploads/1/3/4/3/134315061/davorax.pdfIn PDF document text
    • https://mitixofixomu.weebly.com/uploads/1/3/4/3/134333727/kajugose_mirilizawev_wawomoge_tomajef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378393/normal_5f8b2d8f47ab9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5f8b1f16c936d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375070/normal_5faeaa5c259b0.pdfIn PDF document text
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/xosetowoboxuz.pdfIn PDF document text
    • https://ganajefij.weebly.com/uploads/1/3/4/8/134884795/fdf772433.pdfIn PDF document text
    • https://xelemurefitarag.weebly.com/uploads/1/3/4/6/134601467/ba20345.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/2371655a-6f18-4676-884e-d7610a2195c7/sowukewizodilekapufu.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/55931643508.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/santo_rosario_domingo_escrito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60d27f50-0afe-4a4f-9020-f54149dd36ce/58353960055.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/jolivevetepijarokab.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE199 5392 bytes
SHA-256: a1d287aaaf5bae085a64af49f8c348a8bc8ca92af2d106fec6781e86dfd87811
font_01_sfnt_off0000f409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF409 11536 bytes
SHA-256: fd36729ad62bd9a7bce79f4748b82be86e5373d23c1306cca6f1d25ac2454c0f
font_02_sfnt_off00011a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A69 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e

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