Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd194a75e6470d7…

MALICIOUS

PDF

49.6 KB Created: 2020-04-01 13:39:00 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: a10a4a38d4dac846e72551f08349ec20 SHA-1: f97b4712f4ebcd68cfa3169cd165c42f12028524 SHA-256: abd194a75e6470d78f4c639ea049f07faf203be3f6f41b67eb026b263f9be49d
96 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. The document body contains text that appears to be metadata and a reference to a PDF, along with numerous URLs. The primary attack pattern involves directing users to a vast network of external websites, likely for SEO spam or to host further malicious content.

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://amishcraftcabinetry.com/uploads/1/3/0/4/130488141/130488141.html#libro+del+cisne+negro+pdf PDF link annotation
    • http://tonycardillo.com/uploads/1/3/0/8/130814055/fugewevipe-wixopulaw.pdfIn PDF document text
    • http://confusionvegezgourmet.com/uploads/1/3/0/7/130775741/fobolijeb.pdfIn PDF document text
    • http://samdrakeracing.com/uploads/1/3/0/6/130639272/manukesepil.pdfIn PDF document text
    • http://firefly-poetry.com/uploads/1/3/0/5/130590059/8574399.pdfIn PDF document text
    • http://bibinatural.com/uploads/1/3/0/8/130813643/a1c8397f.pdfIn PDF document text
    • http://238633740554864153.com/uploads/1/3/1/3/131384555/fonivojotori-memaxekanol.pdfIn PDF document text
    • http://melbaustralia.com/uploads/1/3/0/5/130588320/eccc90b2d1a5.pdfIn PDF document text
    • http://bispots.net/uploads/1/3/1/1/131163836/dasurijigetale.pdfIn PDF document text
    • http://villageofironhaven.com/uploads/1/3/0/2/130291640/8929055.pdfIn PDF document text
    • http://ozcameras.net/uploads/1/3/0/6/130621776/c365538503f1c.pdfIn PDF document text
    • http://mail.haze.company/uploads/1/3/0/8/130873907/5554193.pdfIn PDF document text
    • http://edgewateracresfarm.com/uploads/1/3/0/3/130313140/5002766.pdfIn PDF document text
    • http://hoerikwaggaguarding.com/uploads/1/3/0/5/130550882/7526348.pdfIn PDF document text
    • http://sashylinens.com/uploads/1/3/0/8/130874385/a51acc65cf0332f.pdfIn PDF document text
    • http://ohioawnings.com/uploads/1/3/0/2/130271205/mivolijosivowas-posolexad-viwavudebatuses.pdfIn PDF document text
    • http://smartphonefilmfest.org/uploads/1/3/0/5/130589140/zuxol.pdfIn PDF document text
    • http://urgoodenough.org/uploads/1/3/0/4/130488399/mimefixono.pdfIn PDF document text
    • http://joshallen.design/uploads/1/3/0/8/130814341/02c18204d98797f.pdfIn PDF document text
    • http://artinmotionri.com/uploads/1/3/0/2/130271211/582cf970886.pdfIn PDF document text
    • http://mylowvision.com/uploads/1/3/1/1/131164011/396561.pdfIn PDF document text
    • http://vinylalbumwallart.com/uploads/1/3/0/5/130551144/gawezufov-tusavere.pdfIn PDF document text
    • http://emotion-coaching.com/uploads/1/3/0/5/130550813/3f50485d307a9d4.pdfIn PDF document text
    • http://crimsonkisscosmetics.com/uploads/1/3/0/5/130551427/5545067.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_off00007df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF7 9816 bytes
SHA-256: efb9c349553156cb5435363d62c2e3fb8d6aac8983426a1ea1faf343759f5157
font_01_sfnt_off0000a157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA157 16204 bytes
SHA-256: f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d

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