Malicious PDF — malware analysis report

Static analysis result for SHA-256 921017b4c0e743b0…

MALICIOUS

PDF

71.5 KB Created: 2020-03-10 08:31:56 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 5ceabcf4d335ac66da17cdd19db3ad4f SHA-1: f7694fff786b661e82d9e4dfbdfa3eaa35f95315 SHA-256: 921017b4c0e743b0b0e5bf503150a55e8599fd279e6b3d4ae02dc2e5ddb47c2c
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are structured as SEO spam. The primary heuristic indicates a link farm, suggesting the document's purpose is to drive traffic to these sites. The document body contains text related to 'The chronicles of narnia the silver chair book' and wkhtmltopdf metadata, which appears to be a lure to disguise the malicious intent of linking to numerous unrelated PDF files hosted on various domains.

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://8t2u0.salon225.com/uploads/1/3/0/2/130273578/130273578.html#the+chronicles+of+narnia+the+silver+chair+book PDF link annotation
    • http://rachelhorn.org/uploads/1/3/0/6/130604836/fozinotutin-bowuwoxatulosup.pdfIn PDF document text
    • http://wysiwygfilms.com/uploads/1/3/0/9/130969896/5709850.pdfIn PDF document text
    • http://da-look.com/uploads/1/3/0/6/130621477/6772582.pdfIn PDF document text
    • http://iimunc.com/uploads/1/3/0/6/130640066/siboka.pdfIn PDF document text
    • http://www.bwellnhealthy.com/uploads/1/3/0/5/130551623/gofozoxezifisu.pdfIn PDF document text
    • http://msfontes.com/uploads/1/3/0/5/130539129/8b2d1965894.pdfIn PDF document text
    • http://barringtonhillweddings.com/uploads/1/3/0/6/130603690/jovelusutiramof-rulubul.pdfIn PDF document text
    • http://westvalleydoula.com/uploads/1/3/0/7/130776741/tekufulikiribivex.pdfIn PDF document text
    • http://rootsandradicles.com/uploads/1/3/0/5/130540182/mediwefugakod.pdfIn PDF document text
    • http://thenothingman.com/uploads/1/3/0/3/130379504/ff975f4a2305e57.pdfIn PDF document text
    • http://cintri.org/uploads/1/3/0/6/130621772/d02aa4bb1.pdfIn PDF document text
    • http://nutriwisehealth.com/uploads/1/3/0/6/130620528/9f3090939.pdfIn PDF document text
    • http://www.springdaleclaretcup.com/uploads/1/3/0/7/130775942/ca7c7ea98a8621.pdfIn PDF document text
    • http://royalglossbrat.com/uploads/1/3/0/7/130776769/verukirapomo.pdfIn PDF document text
    • http://thriftstorehemet.com/uploads/1/3/0/3/130313265/26a9fab6cfef8d.pdfIn PDF document text
    • http://zen-et-healthy.com/uploads/1/3/0/3/130379457/nipulomevozi_vinur.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_off0000e564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE564 8272 bytes
SHA-256: e120f526dc04fd39408cb3fd74d3914f8bc0216613a07aa2e6be182fe5c688be
font_01_sfnt_off0001055f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055F 2596 bytes
SHA-256: 87fd6b1a35a64f5c2d30902eea89631a9c05d6b36ef70c6d0cee4d2ad867525e

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