Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c036a523815c5f…

MALICIOUS

PDF

33.5 KB Created: 2020-05-13 17:07:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 24259fbbb3bca70efd3234bb12e7a852 SHA-1: 80e006c70ec99882b67052b4e87d9e146237fdc8 SHA-256: 56c036a523815c5fa7d93c4547fd0b9d16403daf3931f364e91b376b43779926
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO spam campaign. The ML classifier also strongly indicated maliciousness. The document body contains garbled text and a few URLs, but the primary malicious activity appears to be the mass redirection to external sites, likely to host further malicious content or phishing pages.

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://lockyerfirstaid.net/uploads/1/3/0/2/130291971/130291971.html#bongo+flava+za+zamani+mix
    • http://nekima.org/uploads/1/3/0/6/130621119/guwopa-fumujatuvem.pdf
    • http://meaningful-life.info/uploads/1/3/0/2/130288554/9254300.pdf
    • http://eastwestflexfoods.com/uploads/1/3/0/7/130776602/7921332.pdf
    • http://bettertogether.press/uploads/1/3/0/2/130272804/jubebugitusej-zojus.pdf
    • http://mmproductionservices.com/uploads/1/3/1/4/131438639/6789624.pdf
    • http://dhuni.net/uploads/1/3/0/9/130969942/bizud.pdf
    • http://scarbroughfamilyeyecare.net/uploads/1/3/0/3/130379466/sajavodebor-dexal-viwujigizofa.pdf
    • http://sabara.co/uploads/1/3/1/6/131606282/2963940.pdf
    • http://sincereservices.org/uploads/1/3/0/6/130639227/sesuputoziru-wemixuxuvum-juliwelafizide.pdf
    • http://msg-ec.com/uploads/1/3/0/6/130639581/2d57fa3d3b.pdf
    • http://atthatradio.net/uploads/1/3/0/7/130739159/292837.pdf
    • http://runwildandbe.com/uploads/1/3/0/4/130476060/zodubuzile_kepebavivebuk.pdf
    • http://powerpackedlearning.com/uploads/1/3/0/6/130639209/fekima_tuduvidalase.pdf
    • http://worldquotesmerch.com/uploads/1/3/0/5/130550790/1384430.pdf
    • http://myfullmenu.net/uploads/1/3/1/4/131408343/kubajojanudez.pdf
    • http://sol-artist.com/uploads/1/3/0/6/130621507/84fde63.pdf
    • http://financialfreedomcanada.com/uploads/1/3/0/6/130620154/1934310.pdf
    • http://northernbeacheshousewash.com/uploads/1/3/1/3/131380042/bivivof-faxufetaraxib-wuvenadi-xixefiwa.pdf
    • http://bczobarstnieciba.lv/uploads/1/3/0/8/130813586/341870.pdf
    • http://alphamanifesto.com/uploads/1/3/1/4/131453121/e8d8333aa0.pdf
    • http://justsaygrace4dinner.com/uploads/1/3/1/3/131384696/redudoze.pdf
    • http://sailforaday.com/uploads/1/3/0/5/130590438/695920.pdf
    • http://simmranbedi.com/uploads/1/3/1/1/131163902/geluwajeruso.pdf
    • http://www.janibotanicals.com/uploads/1/3/0/7/130739113/gamogivusaruwe_kabuxozab_tesex.pdf
    • http://libertyrudo.com/uploads/1/3/0/6/130605176/ee8771862d.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_off00005892.bin
318a18d0f5de65730c67c06f12bdcd4e6dfb26b90df11deed1093e9fff736428		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5892 9660 bytes

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