Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff14892b18d78aec…

MALICIOUS

PDF

58.9 KB Created: 2020-03-28 14:06:58 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 01b3966008d14bdaccfab1422b3b442e SHA-1: d23408ad43e3939dc2c0d5c24ef05b49f01b9ec6 SHA-256: ff14892b18d78aec2b2c192c27246fbcc3ba6d295f94ff981df3feb2f5c1136f
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, many of which point to other PDF files hosted on various domains. This pattern is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The ML classifier strongly supports the malicious nature of this document. No scripts were extracted, and the document body is heavily obfuscated, but the presence of numerous external links is the primary indicator of malicious intent.

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://insurewithhoward.com/uploads/1/3/0/2/130288317/130288317.html#que+es+un+relleno+sanitario+unam PDF link annotation
    • http://samthinks.com/uploads/1/3/0/6/130639462/xezil_wajopuweku_tupixuvurasiwo_wesof.pdfIn PDF document text
    • http://gr8soundslearning.com/uploads/1/3/0/5/130589238/punadefesig-jowifase.pdfIn PDF document text
    • http://www.4eyesdesignz.com/uploads/1/3/0/2/130289480/7804868.pdfIn PDF document text
    • http://sweetsheilastreats.com/uploads/1/3/0/7/130740298/f1e430a.pdfIn PDF document text
    • http://food.work/uploads/1/3/0/6/130639966/todadiwateko.pdfIn PDF document text
    • http://babyak.net/uploads/1/3/0/5/130551896/25fb7a55825490.pdfIn PDF document text
    • http://www.pilgrimsandprodigalscom.com/uploads/1/3/0/4/130435893/folom-tizimod-gelowa.pdfIn PDF document text
    • http://thestorycollective.com/uploads/1/3/0/7/130739892/81793dc19.pdfIn PDF document text
    • http://mta-sts.mail.bhdesignstyle.com/uploads/1/3/0/4/130488539/firolezujaxeluxisi.pdfIn PDF document text
    • http://cpanel.rajeevlehar.com/uploads/1/3/0/6/130621808/e728ce5.pdfIn PDF document text
    • http://ruggedboutique.com/uploads/1/3/0/4/130476216/8621392.pdfIn PDF document text
    • http://probuscurrimundi.com/uploads/1/3/0/7/130739177/155427.pdfIn PDF document text
    • http://www.acupunturavetbarcelona.com/uploads/1/3/0/7/130739904/keronodidamigupapul.pdfIn PDF document text
    • http://alexcog.org/uploads/1/3/0/6/130603692/7784988.pdfIn PDF document text
    • http://learnvibe.com/uploads/1/3/0/6/130639980/a9ee9c85c493.pdfIn PDF document text
    • http://christianwomenie.org/uploads/1/3/0/8/130813509/5846182.pdfIn PDF document text
    • http://bouldercbd.org/uploads/1/3/0/5/130545173/pijedadi_pepum.pdfIn PDF document text
    • http://theyachtracingpodcast.com/uploads/1/3/0/6/130639140/mukofoviteselujopo.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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn 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_off0000b1f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1F0 9064 bytes
SHA-256: d0ae6ebfccf284f19c1b1d0569666b903a8d772ef3548a8a4b10b5b01fcb6634
font_01_sfnt_off0000d276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD276 2604 bytes
SHA-256: 83d89f79375f7f339e88070a8779324ce221c94923bff415e388e162fbc46cfe

Open this report in the interactive analyzer, or submit your own file for analysis.