Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c48684f2134085…

MALICIOUS

PDF

37.6 KB Created: 2020-03-20 06:38:54 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7f8ed78dc4bc11113c057f5741f45b2d SHA-1: c5dba08bdb2bb28b806e7851a3c1230d4cc058ba SHA-256: 27c48684f2134085f76bab4268ba7d8de1ade622dc394b13c66e6337a84bd5f5
62 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, many of which point to similarly structured URLs on different domains. This pattern is indicative of a link farm or SEO spam campaign designed to distribute malicious content. The document body, though partially corrupted, contains text related to 'countable and uncountable nouns worksheets pdf with answers', suggesting a lure to disguise the malicious intent. The primary attack pattern involves redirecting users to potentially harmful websites through these embedded links.

Heuristics 3

  • 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
  • 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://everestdobie.com/uploads/1/3/0/5/130550742/130550742.html#countable+and+uncountable+nouns+worksheets+pdf+with+answers
    • http://doggiespurpose.com/uploads/1/3/0/4/130476481/juxitezugu-sabosikazevig.pdf
    • http://mertior.com/uploads/1/3/0/7/130739887/1717090.pdf
    • http://skincarebygac.com/uploads/1/3/0/5/130588997/7de91c8a6.pdf
    • http://mkhealthcareclinic.com/uploads/1/3/0/7/130776493/6647708.pdf
    • http://sova1.com/uploads/1/3/0/7/130776632/pumifilebovumu.pdf
    • http://creditunionmeraz.com/uploads/1/3/0/2/130289763/c2a037c47761.pdf
    • http://makeitworkwellness.com/uploads/1/3/0/6/130639220/gudezuda-safosaxov-nolijis.pdf
    • http://defineconference.org/uploads/1/3/0/9/130969939/galaf.pdf
    • http://transhumancias-voyages.com/uploads/1/3/0/7/130775753/vakebum.pdf
    • http://ubaconstruction.com/uploads/1/3/0/4/130488270/megafejuwot.pdf
    • http://theurbanclimatologist.com/uploads/1/3/0/3/130380084/3660287.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_off0000675d.bin
0860ef3765a25d93001e255aec68792b871ad5310caefa3d445892e60f649492		 pdf-font-stream PDF embedded font (sfnt) at offset 0x675D 8348 bytes

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