Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b92e1c45c33744b…

MALICIOUS

PDF

50.5 KB Created: 2020-03-30 15:53:00 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-08
MD5: 48fd0a3936b96f1da13b20748bbac777 SHA-1: 97813d7e7a1a2db822a928745e05ccc2aa61b1ba SHA-256: 8b92e1c45c33744bf3789ff3026d4175c10a69ce648b1e13b08254647a3e11a4
136 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO poisoning tactic. The document body contains garbled text but also includes the URL http://michaelshusko.com/uploads/1/3/1/4/131437875/131437875.html#ap+exams+2017+schedule, which is also listed as an external URI. The primary goal appears to be directing users to a multitude of external PDF resources.

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://michaelshusko.com/uploads/1/3/1/4/131437875/131437875.html#ap+exams+2017+schedule PDF link annotation
    • http://mysteryplus.nl/uploads/1/3/0/2/130288523/ad82257c.pdfIn PDF document text
    • http://thebeautybeastfit.com/uploads/1/3/0/3/130323360/5290236.pdfIn PDF document text
    • http://rugandremnantfloors.com/uploads/1/3/0/7/130776779/6fcab96af97d7d.pdfIn PDF document text
    • http://rachel-alice.com/uploads/1/3/0/6/130621196/6949499.pdfIn PDF document text
    • http://michelamclaurin.com/uploads/1/3/0/9/130969595/3880a5f372d1949.pdfIn PDF document text
    • http://johns-tailoring.com/uploads/1/3/0/8/130814516/a441dc.pdfIn PDF document text
    • http://theselfpromoter.com/uploads/1/3/0/8/130873861/juvakusupatabexeruwu.pdfIn PDF document text
    • http://tryonsquare.com/uploads/1/3/0/4/130477090/445770.pdfIn PDF document text
    • http://kimgossettadoptions.com/uploads/1/3/0/5/130539179/d934b3cdb554e.pdfIn PDF document text
    • http://instituteforrelationshipeducation.com/uploads/1/3/0/6/130620868/lurijajem.pdfIn PDF document text
    • http://servereserves.com/uploads/1/3/0/7/130740392/5c17d3fe1b31.pdfIn PDF document text
    • http://jay-maths.com/uploads/1/3/0/2/130288542/rudidamusetubiwal.pdfIn PDF document text
    • http://rbarti.com/uploads/1/3/0/6/130620919/nipaki.pdfIn PDF document text
    • http://drcampana.com/uploads/1/3/0/2/130272638/6249439.pdfIn PDF document text
    • http://chopnmix.com/uploads/1/3/0/7/130739103/zepomidod.pdfIn PDF document text
    • http://briarmoorpool.com/uploads/1/3/0/5/130550774/gukoxu.pdfIn PDF document text
    • http://morganlindsey.org/uploads/1/3/1/1/131164497/5d13cf.pdfIn PDF document text
    • http://c34u.org/uploads/1/3/0/5/130539658/lixinuruzafegi-degex.pdfIn PDF document text
    • http://lrhkokea.com/uploads/1/3/0/5/130588304/563f02c5.pdfIn PDF document text
    • http://kmipropertieslimited.com/uploads/1/3/0/6/130639503/b0fb3f.pdfIn PDF document text
    • http://sempertigris.com/uploads/1/3/0/5/130551299/62f5668.pdfIn PDF document text
    • http://teaysvalleyvolleyball.com/uploads/1/3/0/4/130490399/9203855.pdfIn PDF document text
    • http://thescribingboss.com/uploads/1/3/0/6/130604568/jemadukoxeg-zalolux.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000086ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86FF 8044 bytes
SHA-256: 673e5872b3b07a83a69d230a9de8895bff36bbc6b9ca5e7f6279316253b73b58
font_01_sfnt_off0000a643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA643 16248 bytes
SHA-256: b195ba776360337e0c8847a1f70ebf7e776628c0b6b62df72d82cae76b96cbf1

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