Malicious PDF — malware analysis report

Static analysis result for SHA-256 2934414dfb544fd6…

MALICIOUS

PDF

120.1 KB Created: 2020-04-02 08:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 52983bc1d10153287d884bdcd9835318 SHA-1: b354007288784f7ebc10aebfc4df983198121502 SHA-256: 2934414dfb544fd678a22890df3f80ad9f107d7ec0a27c76559a467539334190
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains, indicating a link farm or SEO spam operation. The document body, though heavily obfuscated, contains text related to 'Educacion primaria en mexico' and references wkhtmltopdf, suggesting a lure to educational content. The heuristic PDF_SEO_LINK_FARM strongly suggests this is a malicious link farm designed to drive traffic or potentially host malicious content. No scripts were extracted from this sample.

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.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://sdrvowners.org/uploads/1/3/0/8/130873861/130873861.html#educacion+primaria+en+mexico
    • http://pureunfoldment.com/uploads/1/3/0/4/130476122/zetudejofigabomok.pdf
    • http://abcwholesale.net/uploads/1/3/0/7/130740450/dadaliwob.pdf
    • http://akhal-tekeperformance.com/uploads/1/3/0/3/130323573/f5c431297.pdf
    • http://global-interactions.online/uploads/1/3/0/4/130489776/pevikovapawepadazis.pdf
    • http://thepurplestore.net/uploads/1/3/0/7/130739371/8e37445ac79f6.pdf
    • http://plie-boutique.com/uploads/1/3/1/3/131383764/20fa3855bb5.pdf
    • http://selfie-sage.com/uploads/1/3/0/4/130483819/b891d702e27.pdf
    • http://supportivestrength.org/uploads/1/3/0/6/130604561/a0ef88bbacbb2.pdf
    • http://stringlineconstruction.org/uploads/1/3/0/4/130435826/vuzarajamagasapok.pdf
    • http://vitalerie.org/uploads/1/3/0/7/130739456/9006552.pdf
    • http://redleafcomics.com/uploads/1/3/1/4/131406077/6748860.pdf
    • http://heckanet.com/uploads/1/3/0/6/130620865/c4a1c8073b.pdf
    • http://mrsdawson-classroom.com/uploads/1/3/0/4/130478244/sisivamovoletub_rajanonisonise.pdf
    • http://precisionmedspajax.com/uploads/1/3/0/7/130776573/2038538.pdf
    • http://travelinghousemousecreations.com/uploads/1/3/0/2/130289729/duvelote.pdf
    • http://beachhouse66.com/uploads/1/3/0/6/130620698/faef5b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018da9.bin
8b5bd1aebcd7cf93f0fb5bc415b82451ade4c479e730f1e1763a0da9f202a879
pdf-font-stream PDF embedded font (sfnt) at offset 0x18DA9 10284 bytes
font_01_sfnt_off0001b220.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B220 2652 bytes
font_02_sfnt_off0001bb87.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB87 16036 bytes