Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d8ab3c551993f01…

MALICIOUS

PDF

81.4 KB Created: 2020-11-22 03:07:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5c63eb01b10f19c15dff06f92ab92da SHA-1: 1f08f8f90e60d160a9bf292f8acf7401a6652dbd SHA-256: 0d8ab3c551993f01e19d780b4a7368ff2aa3b8ed00e9948d4559a804dcc6109a
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains a large number of external links, many hosted on Weebly, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to reference a league table, a common lure for phishing or malware distribution.

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://trafficel.ru/aws?utm_term=belgium+league+table+and+current+form
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/c0f05c9c0a.pdf
    • https://peninugeba.weebly.com/uploads/1/3/4/6/134666339/825924.pdf
    • https://dusexitope.weebly.com/uploads/1/3/4/6/134646398/960b96b0e.pdf
    • https://dopilefuma.weebly.com/uploads/1/3/4/7/134733068/76d55f61f.pdf
    • https://cdn-cms.f-static.net/uploads/4374371/normal_5f8d539918355.pdf
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5f876c3ed4f82.pdf
    • https://cdn-cms.f-static.net/uploads/4445733/normal_5fadfa0124844.pdf
    • https://jelirakiwovul.weebly.com/uploads/1/3/4/8/134867041/90d23b51e5.pdf
    • https://cdn-cms.f-static.net/uploads/4387036/normal_5f8d6139da6c7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rejiner/100_microfarad_capacitor_datasheet.pdf
    • https://s3.amazonaws.com/litunux/new_malayalam_movie_parava_2017.pdf
    • https://s3.amazonaws.com/wogikokuzotaxa/duripatipetilidupofat.pdf
    • https://s3.amazonaws.com/zunaduxa/53126636075.pdf
    • https://s3.amazonaws.com/bodepova/chess_club_reno_nv.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011128.bin
5b49c9025ce6313365abcaaff61f105cad488bf281024d24f808f57f694996b0
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11128 22932 bytes
font_00_sfnt_off0000da25.bin
c92ce99a8dbac8fe836131630c83fbcf69b3cfb609d2b63dfda9004f83ffb964
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA25 5352 bytes
font_01_sfnt_off0000ec44.bin
00db217e097845ba023f353c5e42b0e3aa4b874ce8521812beeb4b7101c453a0
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC44 10776 bytes