Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c5a19269368a07…

MALICIOUS

PDF

55.8 KB Created: 2020-04-02 23:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: df99544ed7d16973d1fae304968f1bd9 SHA-1: a53bc8b592e2e80066fde9b6971b0588824d4dff SHA-256: 47c5a19269368a077d18bb54e58941d6025e0c99454768683b19157158ab6d79
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, many of which appear to be part of an SEO link farm. The primary lure detected in the document body is related to cosmetic surgery, directing users to external sites like http://morningpeople.club/uploads/1/3/0/2/130270895/130270895.html#implantes+de+senos+450cc+fotos+de+ca. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent behind the link farm.

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://morningpeople.club/uploads/1/3/0/2/130270895/130270895.html#implantes+de+senos+450cc+fotos+de+ca
    • http://yofancy.com/uploads/1/3/0/9/130969533/837802.pdf
    • http://mesquesabons.com/uploads/1/3/0/3/130323930/jokofupimuzuwuv-mejer.pdf
    • http://pegasuspercussion.net/uploads/1/3/0/6/130621373/1429167.pdf
    • http://lgaoffice.com/uploads/1/3/0/7/130739910/78e9dab0701d.pdf
    • http://sevenconsultoria.net/uploads/1/3/0/7/130738955/fudonitosam.pdf
    • http://rufgace.store/uploads/1/3/0/3/130323291/zanimobuxem.pdf
    • http://eac-associates.net/uploads/1/3/0/4/130488832/mojimajivose_ropuniwodipoku_dazajoleb.pdf
    • http://integrinscientific.com/uploads/1/3/0/6/130605240/tojaguliludi.pdf
    • http://starkvseurope.com/uploads/1/3/0/7/130776088/058be5b7108c5c1.pdf
    • http://pjpetcare.uk/uploads/1/3/0/7/130739560/banuzove.pdf
    • http://quantummethods.org/uploads/1/3/0/8/130874434/jupurolezeb.pdf
    • http://operasrv.birgerjarl.se/uploads/1/3/0/2/130288426/gixukutibepuwin-dorefimozopar-jatifixujapapo-votigi.pdf
    • http://inspirationalcreationsbysusan.com/uploads/1/3/0/8/130873907/ca5f1a845e1e50d.pdf
    • http://itsnaturalcosmetics.de/uploads/1/3/0/4/130483087/dezesudeb-vegenawuz-jotezaxunorava-nupavulewevukar.pdf
    • http://revras.org/uploads/1/3/0/5/130588145/4453684.pdf
    • http://instituteforchurchandculture.com/uploads/1/3/0/4/130483584/af15f158.pdf
    • http://catherinemallchin.com/uploads/1/3/0/9/130969150/2438812.pdf
    • http://usafaga.com/uploads/1/3/0/2/130272442/zunofadu.pdf
    • http://mrprcat.com/uploads/1/3/0/6/130621363/84845249.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_off0000b036.bin
f867b92cdb3043f441514ab5dbaa6541a5d4d830c6d07f558b143ac34c6fe59a
pdf-font-stream PDF embedded font (sfnt) at offset 0xB036 9104 bytes