Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b82e9ecc4e86244…

MALICIOUS

PDF

35.1 KB Created: 2020-05-18 03:41:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 957cacf9c710a4eda825f98c7fabdd9f SHA-1: 0131f8ef507dff7a5bc3b64c4d7ada7fa29f7c94 SHA-256: 3b82e9ecc4e86244c912bec58351a46dae8eaced160694b75f8f67574ff5e1b1
96 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 document body text is heavily corrupted but appears to reference 'Vcf file format in excel', suggesting a lure to download or view a malicious file. The primary attack pattern involves directing users to a network of suspicious domains, likely for hosting further malicious content or for SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://navice.org/uploads/1/3/0/2/130288603/130288603.html#vcf+file+format+in+excel PDF link annotation
    • http://2wisewomen.net/uploads/1/3/0/6/130605357/xofika-relenomel-pizememamuxij.pdfIn PDF document text
    • http://sandyandcompanyblog.com/uploads/1/3/1/6/131636655/68266c32c2902c.pdfIn PDF document text
    • http://houstonprobateteam.com/uploads/1/3/1/4/131407083/a52ce7836dbe.pdfIn PDF document text
    • http://yuvensdream.com/uploads/1/3/1/6/131636977/7624566.pdfIn PDF document text
    • http://hollieferris.com/uploads/1/3/1/4/131437074/411721.pdfIn PDF document text
    • http://riciclometalli.it/uploads/1/3/0/7/130739552/7ea8393a92e33ac.pdfIn PDF document text
    • http://jerryslawnsalon.com/uploads/1/3/1/1/131164066/zuvodapewokejux.pdfIn PDF document text
    • http://adimef.com/uploads/1/3/0/5/130543663/ninegitidixexeg-sunebefafigasap-pupitofelukib.pdfIn PDF document text
    • http://johnmappin.org/uploads/1/3/0/5/130543264/ditipibave-lagutukekoniv-pumolabiv.pdfIn PDF document text
    • http://cce14u.com/uploads/1/3/0/9/130969535/46094683537.pdfIn PDF document text
    • http://appvolve.com/uploads/1/3/0/8/130814633/wukivolobu.pdfIn PDF document text
    • http://barbizu.com/uploads/1/3/0/2/130270845/laledokopo.pdfIn PDF document text
    • http://lhaconsult.com/uploads/1/3/1/4/131452837/2626039.pdfIn PDF document text
    • http://acardforyourmomcom.com/uploads/1/3/1/3/131398148/2377351.pdfIn PDF document text
    • http://linguapatria.com/uploads/1/3/0/4/130483194/3465122.pdfIn PDF document text
    • http://hellhoundgamers.club/uploads/1/3/0/7/130776795/4df9345585f98d.pdfIn PDF document text
    • http://wopus.info/uploads/1/3/0/6/130604780/betinonurovaku-gikukozob.pdfIn PDF document text
    • http://tarabarkerfineart.com/uploads/1/3/0/7/130739238/vemuzizajedori.pdfIn PDF document text
    • http://bayareaboatandhomeloans.com/uploads/1/3/1/4/131437666/tibalanifufef.pdfIn PDF document text
    • http://cgogarajets.com/uploads/1/3/0/3/130379465/7c18d.pdfIn PDF document text
    • http://hollowaycarpetcare.org/uploads/1/3/0/7/130776850/9035817.pdfIn PDF document text
    • http://garagedoorrepairhermosabeach-ca.com/uploads/1/3/1/8/131871650/adc32858.pdfIn PDF document text
    • http://lejersystems.com/uploads/1/3/0/6/130621444/7846505.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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 3

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_off00005e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7D 9992 bytes
SHA-256: 50dcaf203ba1eb61c0a9bbbd324da1e21214ca14e18cc380ef458b8f6ae4caa2

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