Malicious PDF — malware analysis report

Static analysis result for SHA-256 038a78bd796044c7…

MALICIOUS

PDF

37.8 KB Created: 2020-05-21 19:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: be743068853b3b030c310126af0b3293 SHA-1: c607f37adcb3338e98bcc067d916bcd62ecad3b9 SHA-256: 038a78bd796044c7bdff1bc016895ea555b596a992fbb75409c85085be1fdeac
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The primary purpose appears to be directing users to a vast network of websites, likely for SEO manipulation or to host further malicious content. No scripts were extracted, but the presence of numerous external links suggests a potential for drive-by downloads or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://340.undesirable.us/uploads/1/3/0/3/130313057/130313057.html#alli+rae+ultimate+taboo PDF link annotation
    • http://ivywildtavern.com/uploads/1/3/0/5/130550805/e231bc.pdfIn PDF document text
    • http://shugabugkidsspa.com/uploads/1/3/0/6/130604200/c718d52d9.pdfIn PDF document text
    • http://underscoredancelab.com/uploads/1/3/1/4/131454093/1a5b34.pdfIn PDF document text
    • http://tristanbaroncalligraphy.com/uploads/1/3/0/7/130739017/430823f.pdfIn PDF document text
    • http://saltwaterschool.com/uploads/1/3/0/2/130270982/fetarafiwa_laduwolup_jabib.pdfIn PDF document text
    • http://jrinspiredinteriors.com/uploads/1/3/0/7/130738528/wiromonawamajudel.pdfIn PDF document text
    • http://bucknerdeeterscoutonlandscape.com/uploads/1/3/0/6/130620757/6a9054f442f15.pdfIn PDF document text
    • http://clixkay.com/uploads/1/3/1/3/131384291/nonimofaru_ziridigal_vowiw_kukuw.pdfIn PDF document text
    • http://directbeautymagazine.com/uploads/1/3/1/4/131437194/tafijeribunosa_mopasafivo.pdfIn PDF document text
    • http://mattschultzmusic.com/uploads/1/3/0/5/130590511/4559848.pdfIn PDF document text
    • http://hewittmft.com/uploads/1/3/0/5/130551859/9035556.pdfIn PDF document text
    • http://myhoneybeetherapy.org/uploads/1/3/0/7/130775048/2608008.pdfIn PDF document text
    • http://macsmathclass.com/uploads/1/3/0/2/130289341/a672e2b0e.pdfIn PDF document text
    • http://nursehootdesigns.com/uploads/1/3/0/3/130313643/zoradagutodurovu.pdfIn PDF document text
    • http://carpetcleaningbridgeview-il.com/uploads/1/3/0/5/130551562/pobog-walaguvokukevip.pdfIn PDF document text
    • http://healingvirtueministries.org/uploads/1/3/1/4/131455475/derukijagil-tidezorafujer-zajiwitawofu.pdfIn PDF document text
    • http://490.life/uploads/1/3/0/3/130312937/pugitef-viroxiv.pdfIn PDF document text
    • http://xbells.net/uploads/1/3/0/5/130540116/xozagififikodu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 3

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_off0000666b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x666B 10912 bytes
SHA-256: eedf86702ca62875a3e3554661ce21a6e30f020e80580f5a8e2483fdd8dbb3fd

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