Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1c86cb5378c93a6…

MALICIOUS

PDF

41.3 KB Created: 2020-03-29 05:46:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: eddfc122dccb7b88dc404db4cde2a955 SHA-1: d57690e1eff7027b8f7b5bc1832238b831f2f362 SHA-256: e1c86cb5378c93a67c66c3205d02b24a54bf71b8cfdbfeaf2e95ea83e58ae368
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The document body contains text related to 'Palabras para una quinceanera cristiana' and includes the same URLs found in the heuristics, suggesting a lure to external content. No scripts were extracted from this sample.

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://bailigongyulechengshoujiban.br3h.com/uploads/1/3/0/7/130776508/130776508.html#palabras+para+una+quinceanera+cristiana
    • http://meat-taffy.net/uploads/1/3/0/8/130874313/pelizex_vipegamufomane.pdf
    • http://strangenamedoc.com/uploads/1/3/0/5/130550663/xakuxujenagezufunamo.pdf
    • http://noknot.us/uploads/1/3/0/9/130969904/9852937.pdf
    • http://stlshrinerslimbreconstruction.com/uploads/1/3/0/2/130289733/8e852e73010f7.pdf
    • http://angelidelsorriso.com/uploads/1/3/0/4/130476205/8044409.pdf
    • http://neckiesbymj.com/uploads/1/3/0/4/130477448/tiwurodugoti_zekugag_kakelixipigid.pdf
    • http://pairofjacks.net/uploads/1/3/0/3/130323601/4064089.pdf
    • http://shantelshairboutique.net/uploads/1/3/0/2/130287505/396d0751ea49be3.pdf
    • http://tmmconnections.com/uploads/1/3/0/2/130289623/naxebopenokazen_zesajegazidozix_rewenonirimuxa.pdf
    • http://foodpantriesnig.com/uploads/1/3/0/6/130621418/naxupejukolad.pdf
    • http://chrisscontrols.com/uploads/1/3/0/7/130740013/5809003.pdf
    • http://successorsweightloss.org/uploads/1/3/0/3/130324350/7089285.pdf
    • http://jackpassion.org/uploads/1/3/0/2/130289557/57001.pdf
    • http://64-160-90-252.pacific-solutions.com/uploads/1/3/0/4/130488851/9518730.pdf
    • http://jjgordon.net/uploads/1/3/0/3/130313148/fenogiduzoj.pdf
    • http://767beast.net/uploads/1/3/0/7/130775969/7901693.pdf
    • http://www.larasthemecakes.co.uk/uploads/1/3/0/7/130739635/f927c60.pdf
    • http://bloordaleblog.com/uploads/1/3/0/9/130968992/45bf87bad06e3.pdf
    • http://webmail.la-rocca.org/uploads/1/3/0/6/130603834/bezupida_rojaxebutomuja_najowajixafideg.pdf
    • http://yungpop.com/uploads/1/3/0/3/130313585/puvanulufax.pdf
    • http://midcitybca.com/uploads/1/3/0/2/130272462/dccdf309.pdf
    • http://pnwcabinetry.com/uploads/1/3/0/6/130604724/biraselat_zuxavajuzunubuw.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_off0000753e.bin
6abf64945a6e978242581357b34426166bb0c12431b3822e007dab6ff6870eab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x753E 8928 bytes

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