Malicious PDF — malware analysis report

Static analysis result for SHA-256 143c16edeeb8b5ec…

MALICIOUS

PDF

42.7 KB Created: 2020-03-10 07:16:08 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8756a6210f6e581fb38d523bde89e795 SHA-1: 33bce595715fdd976da4560f03c66f437b73d795 SHA-256: 143c16edeeb8b5ecbf07ffe3c73172d14c5cbeb742c096be07d8593d80bb3d92
136 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are structured as a link farm, suggesting a malicious intent to distribute or redirect to other malicious content. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document's content is designed to trick users into believing there are changes to payment instructions, a common tactic in business email compromise attacks. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://685cm.slpny.com/uploads/1/3/0/6/130639580/130639580.html#uan+account+login+employee
    • http://internationaljusticeleague.net/uploads/1/3/0/6/130639327/c1a1f90b25.pdf
    • http://www.montserratandco.com/uploads/1/3/0/7/130739747/zedakaroxazumop.pdf
    • http://mrsjlittlefield.com/uploads/1/3/0/5/130588261/6085619.pdf
    • http://thecollectivegood.net/uploads/1/3/0/4/130491166/2fd9da52f.pdf
    • http://eightpawsbakery.com/uploads/1/3/0/4/130488583/kozowuv_lololije.pdf
    • http://www.finestmanukahoney.com/uploads/1/3/0/7/130739751/wifeken.pdf
    • http://odcdmv.marketingfactorygroup.com/uploads/1/3/0/5/130588150/2590010.pdf
    • http://www.riseaboveleadership.com/uploads/1/3/0/7/130740256/zevulelapipebiziw.pdf
    • http://www.instlarcafe.com/uploads/1/3/0/2/130270740/99fa4d4f7d.pdf
    • http://astrologieparis.fr/uploads/1/3/0/6/130639452/95f6030ec43ee8.pdf
    • http://autodiscover.fillogreekbakeshop.com/uploads/1/3/0/3/130313854/xifigixuzorop.pdf
    • http://amelialinternsmith.com/uploads/1/3/0/6/130639913/narigajewazev-nijuvujovez-vodag.pdf
    • http://theyounghomemaker.net/uploads/1/3/0/5/130540214/56ea9e3e2c5b.pdf
    • http://mydigitalvote.com/uploads/1/3/0/7/130775297/tezegoxan.pdf
    • http://stain-goed.nl/uploads/1/3/0/5/130590163/9525635.pdf
    • http://mrsmalloy.info/uploads/1/3/0/2/130271085/zabolivawipa_tomixuwixoja_sititez.pdf
    • http://nationalbeardedqueen.com/uploads/1/3/0/6/130621734/1806079.pdf
    • http://urbanlogs.com/uploads/1/3/0/7/130775780/3103561.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_off00007f43.bin
eb8b54023310ffbd36946b05f9b7c410fb78c89eae6705a41c970746ba560d66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F43 7732 bytes

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