Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de891170b856c93…

MALICIOUS

PDF

40.8 KB Created: 2020-03-31 22:14:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: de8b29a8990ca91763cb85e557a6783a SHA-1: e7753f0e71b387aadd6bb83ecdac3a944e646f7b SHA-256: 3de891170b856c93edf39cee8a0a45c81cf524da4d9df817e03fa9a05783cb9f
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body contains text related to a service territory map and wkhtmltopdf metadata, but the primary malicious activity appears to be the distribution of numerous links to other PDF files hosted on various domains. This suggests a link farm or SEO poisoning attack, potentially to distribute malware or phish users.

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://mibfrance.com/uploads/1/3/0/5/130551249/130551249.html#southwestern+public+service+company+service+territory+map
    • http://hornersservicedfw.com/uploads/1/3/1/1/131164293/razuxegilowagew.pdf
    • http://nextlevelproperties.org/uploads/1/3/0/6/130639884/3045462.pdf
    • http://blahg-blahg-blahg.com/uploads/1/3/0/4/130476243/1804711.pdf
    • http://kunstraumgarage.org/uploads/1/3/1/4/131453576/7588556.pdf
    • http://losachicboutique.ca/uploads/1/3/0/6/130639559/408584e23.pdf
    • http://makelemonade.shop/uploads/1/3/0/7/130739023/909374.pdf
    • http://jen-n-outlaws.com/uploads/1/3/1/4/131453494/wufixigelarapal_sowudagifogu_renadonege_tilujapadufetaj.pdf
    • http://skillassoundandvision.com/uploads/1/3/0/3/130379485/lizinif_fepud_gadusexowipazat_verin.pdf
    • http://warmlyworn.com/uploads/1/3/0/6/130603803/8904125.pdf
    • http://4120goldmineroad.com/uploads/1/3/0/5/130588847/komituzun.pdf
    • http://ncln.com/uploads/1/3/0/7/130739294/6163877.pdf
    • http://theoillife.shop/uploads/1/3/0/5/130539706/7292939.pdf
    • http://southernintegrity.net/uploads/1/3/0/3/130380037/tarepadejupu.pdf
    • http://capital1financeconsultants.com/uploads/1/3/1/0/131071196/9554642.pdf
    • http://glam2bella.com/uploads/1/3/1/3/131382673/2878244.pdf
    • http://mrliz.com/uploads/1/3/0/5/130540219/6551fb7c.pdf
    • http://northwalestreeservices.com/uploads/1/3/0/5/130543285/b7e6fb2.pdf
    • http://diceandwhatever.com/uploads/1/3/0/5/130590400/bisamonasadokobed.pdf
    • http://heathertaylorhomes.net/uploads/1/3/0/5/130550655/4731c260745c.pdf
    • http://liftedbyalissa.com/uploads/1/3/0/4/130488850/fanixafiper_dolanopijekuki.pdf
    • http://fiefiatonga.com/uploads/1/3/1/3/131384660/325966.pdf
    • http://pattijodesignsmotherofpearls.com/uploads/1/3/0/7/130738803/7444564.pdf
    • http://gtp-europe.com/uploads/1/3/1/0/131070827/zulaninunomodasajejo.pdf
    • http://ecosecretsfoundation.com/uploads/1/3/0/6/130620428/fafuzogogurite-didev-siralawi-jobut.pdf
    • http://theoldshipaground.blog/uploads/1/3/0/3/130313000/dipubalure-nozake.pdf
    • http://ecosecretsfoundat
    • 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_off00007528.bin
262f1d63ca439881cacc3d8474f35f681fbbd3f26fca407fb5f1e2795708d1d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7528 8112 bytes

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