Malicious PDF — malware analysis report

Static analysis result for SHA-256 11678eaa667717ba…

MALICIOUS

PDF

32.8 KB Created: 2020-03-30 03:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 35a12cd0d4101c2b28737e61d5552bfd SHA-1: f7211d16167368ce7cef6ba76719b00d951a3852 SHA-256: 11678eaa667717baf5e122c0cb10e132aa83724596a1cbb17b31d709b951fe39
96 Risk Score

Malware Insights

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

The PDF contains numerous embedded links to external websites, disguised as a game download. The heuristic PDF_SEO_LINK_FARM indicates a large number of these links, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs points towards a potential phishing or malware distribution attempt. No scripts were extracted, but the document body itself contains URLs that are likely intended to redirect the user to malicious 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://74-123-72-53.mgwnet.com/uploads/1/3/0/4/130477420/130477420.html#robokill+2+full+game
    • http://theteaspiceco.com/uploads/1/3/0/8/130814803/nobavesokus.pdf
    • http://theweightlosscoach.net/uploads/1/3/0/5/130541950/xejiwebonimokowu.pdf
    • http://immigrationpartnersofamerica.com/uploads/1/3/0/7/130740351/tagob.pdf
    • http://villagelaser.com/uploads/1/3/1/3/131384643/jilufa.pdf
    • http://teresacombsphotography.com/uploads/1/3/0/7/130739723/6625420.pdf
    • http://postgrados-economicasusac.info/uploads/1/3/0/5/130551041/tavovigeraxunamew.pdf
    • http://americandustcontrol.com/uploads/1/3/0/6/130621859/pulirapi.pdf
    • http://yoh-almo.com/uploads/1/3/0/6/130620356/b62dc66a.pdf
    • http://blanchardstevens.com/uploads/1/3/0/4/130489185/sijujus_lajevog_davusemu.pdf
    • http://prestopresto.ca/uploads/1/3/1/0/131070212/6165839.pdf
    • http://professionalquadcopterdrone.com/uploads/1/3/0/5/130538949/365a6a22086.pdf
    • http://xobrilee.com/uploads/1/3/1/1/131164392/gojelevoporakigiri.pdf
    • http://ironworksbrewery.com/uploads/1/3/0/4/130483833/putomesowofak-mofot.pdf
    • http://curiousquantum.com/uploads/1/3/0/7/130775819/regup.pdf
    • http://swingstatereport.com/uploads/1/3/0/7/130775504/kewefa.pdf
    • http://gemtha.net/uploads/1/3/0/4/130436207/1313192.pdf
    • http://pandorasplayhouse.org/uploads/1/3/0/4/130477176/tovurotegepukom-gokutowuwizok-nuronivasijol.pdf
    • http://houseofburdens.com/uploads/1/3/0/5/130545753/pawonikapanate.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_off000059a7.bin
4437dc24718c7641026c856f2a78bc032e6a1b23b21cac923597ef82faa1352b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A7 7228 bytes

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