Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b0ad23fe0453704…

MALICIOUS

PDF

35.8 KB Created: 2020-03-24 09:41:27 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1a016d75815fdb1d87323fe3debd8d69 SHA-1: 79734b692adc936ed48800cbcf4f486fc9c9abc7 SHA-256: 2b0ad23fe04537042ca45277d4c262b2ce6faa8073061ed1b16d32d839cd60cb
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a link farm, a common technique for SEO poisoning and distributing malicious content. The primary link points to a document that appears to be a manual, but the heuristic firings indicate a mass of external PDF links, suggesting a deceptive lure. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://reinacarioti.com/uploads/1/3/0/6/130640027/130640027.html#ingersoll+rand+ssr+ep+60+manual
    • http://authornicoleedwards.com/uploads/1/3/0/5/130590076/kizuxasufig-tirizevinafimum.pdf
    • http://www.governmentscout.us/uploads/1/3/0/2/130270980/3422377.pdf
    • http://foodie-wines.com/uploads/1/3/0/4/130483243/fufeniga.pdf
    • http://viviannixon.net/uploads/1/3/0/7/130776790/edee07f7e9bf.pdf
    • http://mail.forestermarine.com/uploads/1/3/1/0/131071176/zuzegowoketifow-xuwexirosi-tinaboroganiduf.pdf
    • http://casford.org/uploads/1/3/0/7/130739789/pikazefopu.pdf
    • http://thefriendlyguru.org/uploads/1/3/0/3/130313766/f36a3601.pdf
    • http://baltimoreemergencyplumber.com/uploads/1/3/0/2/130271121/datijeson.pdf
    • http://museumeats.com/uploads/1/3/0/7/130738830/nuvep_woximaxamov_doxetilikoguze_xasaz.pdf
    • http://mibest.se/uploads/1/3/0/3/130379673/rewugavajebudojinilo.pdf
    • http://www.savannahbeach.net/uploads/1/3/0/4/130483070/vesufo-diteronazuwiwet-pevivobofapi-dipiro.pdf
    • http://lengendsswimcamp.com/uploads/1/3/0/5/130551210/ruditazamu.pdf
    • http://www.weekendarting.co.uk/uploads/1/3/0/4/130483373/rexusebe.pdf
    • http://mta-sts.mx.durhamregionroofing.com/uploads/1/3/0/4/130476873/xirizixatapeguno.pdf
    • http://designbcs.com/uploads/1/3/0/3/130313376/xisurusisulam.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063f6.bin
f21c0328f25802911eadd1c9fc4d41fb96654ee08b12ba657eab63bc211227aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F6 7668 bytes

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