Malicious PDF — malware analysis report

Static analysis result for SHA-256 52806d05a7e11a57…

MALICIOUS

PDF

42.7 KB Created: 2020-03-15 14:41:01 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: e8c18a0f7ade248ac092ba5bcaf57941 SHA-1: 4f46b9cf49d3504ea826702ce982bbff9355fc6a SHA-256: 52806d05a7e11a5739a84ea492e776e39ec1f62e1f73f3e958351130f1ae8d90
104 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 other PDF files, suggesting a link farm or SEO poisoning tactic. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into clicking these links. The primary URL http://lmi7fs.salon225.com/uploads/1/3/0/6/130621011/130621011.html#after+effects+cs6+text+plugins+free appears to be a lure for software plugins, likely leading to malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lmi7fs.salon225.com/uploads/1/3/0/6/130621011/130621011.html#after+effects+cs6+text+plugins+free PDF link annotation
    • http://equinoxtalks.com/uploads/1/3/0/5/130539718/jatutekapevujo_musafemifuz.pdfIn PDF document text
    • http://www.tskdividends.com/uploads/1/3/0/6/130621371/47790ce8.pdfIn PDF document text
    • http://collegegroverec.org/uploads/1/3/0/5/130546977/ketizit.pdfIn PDF document text
    • http://www.mycpstory.com/uploads/1/3/0/5/130589411/paludoz_gojoforupuwukas_runeratazapa_tubuwof.pdfIn PDF document text
    • http://misshufnagel.com/uploads/1/3/0/5/130588248/rebumafox.pdfIn PDF document text
    • http://www.berelaxedmn.com/uploads/1/3/1/1/131164211/gezajis.pdfIn PDF document text
    • http://www.larissaportfolio.com/uploads/1/3/0/7/130775624/8161949.pdfIn PDF document text
    • http://webdisk.amyvantintelen.nl/uploads/1/3/0/5/130540559/katogoxutuwin.pdfIn PDF document text
    • http://morocco.ency-education.com/uploads/1/3/0/6/130603945/beecb07.pdfIn PDF document text
    • http://learnadjustgrow.com/uploads/1/3/0/4/130476012/1583845.pdfIn PDF document text
    • http://myladderfromatob.org/uploads/1/3/0/7/130776300/9410775.pdfIn PDF document text
    • http://www.getlylty.com/uploads/1/3/0/6/130621337/e0e7d72.pdfIn PDF document text
    • http://northstarmuseum.org/uploads/1/3/0/6/130639360/zanazovibar-zimesitomivi-rutenelegibi.pdfIn PDF document text
    • http://mrbugfix.com/uploads/1/3/0/2/130288932/dowaven.pdfIn PDF document text
    • http://californiandeli.org/uploads/1/3/0/3/130323216/2564752.pdfIn PDF document text
    • http://inthehoopembroiderydesigns.net/uploads/1/3/0/3/130323928/kewogewe_wumikoxiv.pdfIn PDF document text
    • http://emailmarketing507.com/uploads/1/3/0/7/130775634/9468068.pdfIn PDF document text
    • http://emmadevereux.com/uploads/1/3/0/6/130604685/duzozifomo.pdfIn PDF document text
    • http://nationalriskmanagementgroup.com/uploads/1/3/0/7/130775045/354d623b563.pdfIn PDF document text
    • http://solutioncities.org/uploads/1/3/0/6/130621426/2471277.pdfIn PDF document text
    • http://aim4victory.com/uploads/1/3/0/7/130775678/safebitepuluw-rajiwejox.pdfIn PDF document text
    • http://www.henryholdingllc.com/uploads/1/3/1/0/131070168/b4d898.pdfIn PDF document text
    • http://www.7325printshop.com/uploads/1/3/0/3/130323207/ca261a1.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BEA 8664 bytes
SHA-256: 03319e490f01efeb0e1ef05649eac5a248c844413edc4511b8d07cb756f13a6a

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