Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26b858257399422…

MALICIOUS

PDF

73.9 KB Created: 2020-11-14 11:17:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10cae4f394d142830086b5bd8a3c3f7c SHA-1: 1e81deb437be974fbdd01e29b63135d55d7da585 SHA-256: e26b858257399422e72604e5ed52bebf081c6510b00cdf8b40d783073bc4fcc3
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO spam or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a large number of external PDF links, suggesting a malicious intent to redirect users. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards a malicious document, likely delivered as a spearphishing attachment.

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://traffnew.ru/aws?utm_term=putah+creek+fishing+report+2019
    • https://luwobidope.weebly.com/uploads/1/3/0/8/130814225/8f4c3a8934a.pdf
    • https://lukafove.weebly.com/uploads/1/3/4/6/134655473/5621556.pdf
    • https://gasagadivegolix.weebly.com/uploads/1/3/4/4/134488570/2159003.pdf
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/pisuguse.pdf
    • https://xobijetulotifo.weebly.com/uploads/1/3/4/2/134234675/a3ebca55a60c.pdf
    • https://fikazimibugexu.weebly.com/uploads/1/3/4/5/134515259/raxowot.pdf
    • https://garigewofunem.weebly.com/uploads/1/3/4/3/134314314/kiwafaweri.pdf
    • https://setinedib.weebly.com/uploads/1/3/4/6/134684411/tedivowon-zijot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/wewuxuviwar/arduino_nano_datasheet.pdf
    • https://s3.amazonaws.com/zupenafud/dafoxiv.pdf
    • https://s3.amazonaws.com/tizowodifi/a_thousand_acres_chapter_summary.pdf
    • https://s3.amazonaws.com/gofiguj/emoji_bridal_shower_game_free_printable.pdf
    • https://s3.amazonaws.com/potofaw/84062960065.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d501.bin
c728b6094e46f62230c1532dbed67f4c584bc6b15f81514b26c2ce63a408f00e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD501 5676 bytes
font_01_sfnt_off0000e84a.bin
a5a83ce91d4499687c2e9db84030463ab438b1f494f2d8982b7924ae39d49cbd
pdf-font-stream PDF embedded font (sfnt) at offset 0xE84A 10724 bytes
font_02_sfnt_off00010cf1.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF1 4324 bytes