Malicious PDF — malware analysis report

Static analysis result for SHA-256 a743384b2308d41d…

MALICIOUS

PDF

48.8 KB Created: 2020-03-29 07:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 95376f771a563a13899ce81518789589 SHA-1: 2ca1c80e274265e3680fcbb86b797e4a81902c44 SHA-256: a743384b2308d41d881a4eceb40d99966e3ad9cf841d239da322963576381e2e
136 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The embedded URLs point to a network of domains, suggesting a link farm or a redirection scheme. The document body, though partially corrupted, contains a URL that aligns with the findings of the PDF_URI heuristic. No scripts were extracted from this sample.

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://hotelvic-phase2-ko.devsite-1.com/uploads/1/3/0/7/130775336/130775336.html#analyzing+moral+issues+quizlet PDF link annotation
    • http://mx.empowermentworks.org/uploads/1/3/0/7/130738696/wivona-napuvadifono-pufomududi.pdfIn PDF document text
    • http://earthwoodtimber.com/uploads/1/3/1/3/131380171/d2ffd.pdfIn PDF document text
    • http://feebasedplanning.org/uploads/1/3/0/6/130604141/e9ddc3ee.pdfIn PDF document text
    • http://www.tri-split.com/uploads/1/3/0/5/130543685/8f54afd5b.pdfIn PDF document text
    • http://norwooddentalblog.com/uploads/1/3/0/6/130603745/5bd93bdd7e04610.pdfIn PDF document text
    • http://www.kinseyswainphotography.com/uploads/1/3/0/7/130739883/wutekoris_papupezizunune.pdfIn PDF document text
    • http://nectr.ca/uploads/1/3/0/7/130738830/947533.pdfIn PDF document text
    • http://antocorppower.com/uploads/1/3/0/5/130550832/3191882.pdfIn PDF document text
    • http://signa-holding-asia.org/uploads/1/3/0/5/130551144/risuxezevevonepikele.pdfIn PDF document text
    • http://slobberandsnouts.com/uploads/1/3/0/5/130544132/pofabunetagorapid.pdfIn PDF document text
    • http://funandjoy.net/uploads/1/3/1/3/131382470/pizone-guxilifubevo-wedatolifejiw.pdfIn PDF document text
    • http://www.alexishoffmanclassroom.com/uploads/1/3/0/4/130488773/2002033b83.pdfIn PDF document text
    • http://bellinghammusicenrichmentproject.org/uploads/1/3/0/8/130874304/6535802.pdfIn PDF document text
    • http://themissinglinkblog.co.uk/uploads/1/3/0/3/130379058/guzetitumatak.pdfIn PDF document text
    • http://www.stephaniedonily.com/uploads/1/3/0/2/130272385/7235103.pdfIn PDF document text
    • http://www.wasatchliquidation.com/uploads/1/3/0/7/130776120/nafujegem-misepi-jufutodo-logagag.pdfIn PDF document text
    • http://55florida.com/uploads/1/3/0/2/130291649/4421609.pdfIn PDF document text
    • http://rivereasttravel.com/uploads/1/3/0/6/130639258/wusamenaf_jadelerereso.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 8

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_off000095dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95DC 8288 bytes
SHA-256: b9622574b6abc91f94bdcdae26d31c7b20a07013952b9f7d6887ae2b33e4a403

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