Malicious PDF — malware analysis report

Static analysis result for SHA-256 f764d6a62f3c1cf1…

MALICIOUS

PDF

40.2 KB Created: 2020-03-30 11:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fa194000707dbdbddce8424698c9344e SHA-1: 36c7a77094ffa1c691312b07b02f2aa5b5e2da24 SHA-256: f764d6a62f3c1cf10e55ae16aac3d8cc4dae6d9c1873a062accabc6bafc89ca5
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on various domains. The ML classifier strongly indicated maliciousness. The document body, though partially obfuscated, contains text related to 'Politica contable caja chica' and includes URLs that are likely part of a link farm designed to distribute malicious content or conduct phishing attacks.

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://74-123-76-197.mgwnet.com/uploads/1/3/0/4/130488217/130488217.html#politica+contable+caja+chica
    • http://advocateability.com/uploads/1/3/0/6/130604093/958c1493bab55c5.pdf
    • http://radiancecleaning.com/uploads/1/3/1/0/131070535/0a2f8c.pdf
    • http://randiegley.info/uploads/1/3/1/4/131406153/f6fc9cc.pdf
    • http://triumphbikerentals.com/uploads/1/3/0/6/130621135/mufilebebupokigan.pdf
    • http://asburycropfarm.org/uploads/1/3/0/6/130639539/747b34b63e74c4.pdf
    • http://reasonerstorussia.com/uploads/1/3/0/4/130488831/82bfe5c28fdb64.pdf
    • http://tonebabyrecords.com/uploads/1/3/0/6/130639484/zawodikuvidozot.pdf
    • http://aeautomotive.org/uploads/1/3/0/2/130288326/nukedeb_mabed_suzirim_puporesiruvow.pdf
    • http://wmlaboratory.com/uploads/1/3/0/3/130313340/9484913.pdf
    • http://distribuidorazaqueo.com/uploads/1/3/0/5/130539344/8debd04004c3cf.pdf
    • http://californiacustomwindows.com/uploads/1/3/1/3/131384256/pufamifekotowu.pdf
    • http://sunrisecleaningcompanyltd.com/uploads/1/3/0/4/130476850/8962636.pdf
    • http://lewiscbsolutions.com/uploads/1/3/0/5/130551331/sowaviw-dovore-dumukejepijope-nerinanilokuna.pdf
    • http://tombtrippin.com/uploads/1/3/0/6/130621548/6277045.pdf
    • http://ramosalcazarconstruction.com/uploads/1/3/0/4/130488812/biwavepajok_fosipekir.pdf
    • http://breadoflifeminot.org/uploads/1/3/0/6/130621013/rekojo_tegawexejuwadu_dogikovewatip_sodadidevofa.pdf
    • http://cozycanary.com/uploads/1/3/1/0/131070389/9fb570bdb.pdf
    • http://911bailbondsla.com/uploads/1/3/1/3/131381782/7706714.pdf
    • http://9f60lcb504.com/uploads/1/3/0/5/130544872/3110534.pdf
    • http://greenhallcap.com/uploads/1/3/0/5/130551625/rogivev-batobo.pdf
    • http://psicologaprato.com/uploads/1/3/0/5/130588570/5548310.pdf
    • http://melindamiguel.com/uploads/1/3/0/2/130291623/5095686.pdf
    • http://mintcondition.us/uploads/1/3/0/5/130588581/1067581.pdf
    • http://fragrancize.com/uploads/1/3/0/7/130740130/95302dcc0593a0.pdf
    • http://onefive8.com/uploads/1/3/0/5/130588658/c445ebccb8ac.pdf
    • http://fragrancize.com/upl
    • 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_off00007391.bin
643ad093d91a56bf50cf86aad5e3dc5a0a6aab5579e194720549001162c53f07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7391 8132 bytes

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