Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e5e6d19e2ceb1cb…

MALICIOUS

PDF

112.1 KB Created: 2020-06-03 03:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a116d92efd031ce1bc23708ec39a9ead SHA-1: 297d3efef2a898435d0b9922785e55136071278a SHA-256: 0e5e6d19e2ceb1cbe956212d2ceea362401c1fa122868add8fa944abf6d6aa04
96 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a link farm detection and an ML classifier. It contains a large number of external URLs, many of which appear to be part of a link farm designed to obscure malicious destinations. The primary URL, http://webmail.jacquelineclewis.com/uploads/1/3/0/7/130775557/130775557.html#%25D8%25A7%25D9%2584%25D8%25AF%25D9%2583%25D8%25AA%25D9%2588%25D8%25B1+%25D8%25AC%25D9%2588%25D9%2586+%25D9%2583%25D9%2584%25D9%258A%25D9%2585%25D9%2586%25D8%25AA%25D8%25B3, is likely a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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 http://webmail.jacquelineclewis.com/uploads/1/3/0/7/130775557/130775557.html#%25D8%25A7%25D9%2584%25D8%25AF%25D9%2583%25D8%25AA%25D9%2588%25D8%25B1+%25D8%25AC%25D9%2588%25D9%2586+%25D9%2583%25D9%2584%25D9%258A%25D9%2585%25D9%2586%25D8%25AA%25D8%25B3
    • http://dentalhomegeorgia.com/uploads/1/3/0/5/130588508/nuvefejojefosedikif.pdf
    • http://biofieldtherapy.net/uploads/1/3/1/4/131408245/2340e6938.pdf
    • http://wanjiaboxianshangyule.br3h.com/uploads/1/3/1/3/131383738/3742792.pdf
    • http://osmosistours.com/uploads/1/3/1/3/131380008/382c5.pdf
    • http://andyshomeservices.com/uploads/1/3/0/4/130488833/5299104.pdf
    • http://willisinsure.com/uploads/1/3/1/4/131453808/busulepalik.pdf
    • http://jiaxuanzhang.org/uploads/1/3/0/5/130590702/9906919.pdf
    • http://webmail.jacquelineclewis.com/uploads/1/3/0/7/130775557/terms.html
    • http://webmail.jacquelineclewis.com/uploads/1/3/0/7/130775557/dmca.html
    • http://webmail.jacquelineclewis.com/uploads/1/3/0/7/130775557/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://sajugubebu.files.wordpress.com/2020/06/jipukilonire.pdf
    • https://gujobuzagam594322867.files.wordpress.com/2020/05/45219452901.pdf
    • https://winapuxexi.files.wordpress.com/2020/06/matemodorali.pdf
    • https://duzawexosusa.files.wordpress.com/2020/05/dexepipixata.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00015452.bin
78ade9c37701a4cc7cfae0d224ea428ae1c66c6fee00f779e53c0b8a821f136c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15452 33784 bytes
font_01_sfnt_off00018d4f.bin
bffae018c90c07e48c2627c4a8f647eff81d506c06fa68353f23a28b0d75c797		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18D4F 10992 bytes

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