Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d49b94d47cf3bf4…

MALICIOUS

PDF

66.9 KB Created: 2020-11-30 12:34:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1372dde8d7759e6c18fb5d3391beb4ac SHA-1: ea5dc9bc1092206a480240c376ba353105ab4900 SHA-256: 9d49b94d47cf3bf459ea5dee9f42019d0f3262cd102f5f9d7d581641a4d7a96b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The document body, though heavily obfuscated, suggests a lure related to 'Ae solar panel datasheet'. The presence of external links and the nature of the heuristics strongly indicate a malicious intent, likely for SEO manipulation or to direct users to phishing or malware sites. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/aws?utm_term=ae+solar+panel+datasheet
    • https://logekififej.weebly.com/uploads/1/3/4/5/134502341/sokefinuxefupud.pdf
    • https://gubofeze.weebly.com/uploads/1/3/4/4/134497342/8486705.pdf
    • https://lavigumujow.weebly.com/uploads/1/3/4/4/134438710/5608650.pdf
    • https://xazezegusi.weebly.com/uploads/1/3/4/5/134505133/dadepepoze-jodelipudo.pdf
    • https://lorebigida.weebly.com/uploads/1/3/4/3/134377432/f572c975.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4d1172be-8a25-45f6-9f27-0dd1e098d105/53316072387.pdf
    • https://uploads.strikinglycdn.com/files/76658bc5-99fa-4de6-a541-a5472e79374a/zurujemasutararujizusog.pdf
    • https://uploads.strikinglycdn.com/files/9d1c68b5-bc9d-48d1-acd9-19ce0ec6c7ca/nararimubur.pdf
    • https://uploads.strikinglycdn.com/files/778a9157-a9a2-429d-8921-22c8642b4dd3/66485147817.pdf
    • https://uploads.strikinglycdn.com/files/080945f7-4534-4556-beae-4e83379cc4fc/tapunafok.pdf
    • https://static1.squarespace.com/static/5fc0abc6bda9c57a97bd16fd/t/5fc422739d79364840104061/1606689396320/gogenapuxufuvuzi.pdf
    • https://s3.amazonaws.com/tobojelusiwi/high-_performance_liquid_chromatography_method_for_analysis.pdf
    • https://uploads.strikinglycdn.com/files/182c7a93-216b-4c18-87c9-c31d8b6399a3/mafowoxikowidepejoxejari.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_off0000c8bc.bin
b8496c4e2fb676a835adc9c38289bd463779eae78895f2af3a7565045b3f6d41
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BC 5036 bytes
font_01_sfnt_off0000d9d1.bin
c2263d70799bcface8f1a06730b795079f6d5b2116109ca59d552d509be21028
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D1 11000 bytes