Malicious PDF — malware analysis report

Static analysis result for SHA-256 dba5ef0a80006f98…

MALICIOUS

PDF

70.9 KB Created: 2021-02-26 08:57:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 735a3c746c8fba45604ead677fb861b2 SHA-1: 254cec045a74112c9ca9aa97c0f456b354be1184 SHA-256: dba5ef0a80006f98c45a43803f21813dc6f4f8a40d0344fbd1a2822b321d17d2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, suggesting a link farm or phishing attempt. The document body, though partially corrupted, indicates it is presented as an 'owner's manual', a common lure. No scripts were extracted, but the presence of numerous external URLs points towards a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=pse+brute+x+owners+manual
    • https://nugenezeni.weebly.com/uploads/1/3/4/6/134632238/nawatazekowomeru.pdf
    • https://static.s123-cdn-static.com/uploads/4409243/normal_5fc8c83f0efb5.pdf
    • https://cdn-cms.f-static.net/uploads/4462992/normal_5fe8628c85478.pdf
    • http://snegny.com/42443366217qg0aq.pdf
    • http://zhenskiizhurnal.ru/7314702563421tz9.pdf
    • https://static.s123-cdn-static.com/uploads/4449424/normal_600643d034fde.pdf
    • https://cdn-cms.f-static.net/uploads/4407571/normal_60294a9c300d3.pdf
    • http://copyrightnotice-ig.com/pillars_of_eternity_2_aloth_romance_guide6xu3k.pdf
    • http://beststudent.space/gofojifidaec2y5.pdf
    • https://fumunavizagoz.weebly.com/uploads/1/3/4/2/134235019/nutadugumigebitat.pdf
    • https://cdn-cms.f-static.net/uploads/4491432/normal_6017536189561.pdf
    • https://cdn-cms.f-static.net/uploads/4483855/normal_6011386c68f14.pdf
    • http://urologo.store/98365208066z3gv.pdf
    • https://static.s123-cdn-static.com/uploads/4470689/normal_5fcc9dd387261.pdf
    • https://volilisaxox.weebly.com/uploads/1/3/1/4/131453747/9513864.pdf
    • https://damemerivojed.weebly.com/uploads/1/3/4/3/134378109/de966e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tavamikilav.myartsonline.com/30382584085.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da36.bin
db5af911664c87777a2e32160f75296c0805a4a6650d1e9b23431ea3f0a47ac4
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA36 5132 bytes
font_01_sfnt_off0000eba2.bin
bd6fdae7af9c232159664bf60eb9c036df9b4bf10c607a15beaa51da4ac318a3
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA2 10260 bytes