Malicious PDF — malware analysis report

Static analysis result for SHA-256 c960fcc59c8bc016…

MALICIOUS

PDF

42.2 KB Created: 2020-04-03 04:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 758b5a1367c6cff6ade4427f9918588e SHA-1: ef57e26b865fb1a319d8683f392ffd17c54bdaae SHA-256: c960fcc59c8bc016660022d11dd2bcba56969fdd134fa066fbedfdcd11a0bfb1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains a large number of external links, many of which point to other PDF files. One of the embedded URLs, 'http://drobgyn.net/uploads/1/3/0/4/130488506/130488506.html#add+java+to+path+windows+7+64+bit+download+oracle', suggests a lure related to software installation. The heuristic 'PDF_SEO_LINK_FARM' indicates a technique to generate many links, likely for SEO manipulation or to host malicious content. No scripts were extracted from this sample.

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://drobgyn.net/uploads/1/3/0/4/130488506/130488506.html#add+java+to+path+windows+7+64+bit+download+oracle PDF link annotation
    • http://thetruthaboutbellinghambaptistchurch.net/uploads/1/3/1/3/131379012/pubabopubenexezo.pdfIn PDF document text
    • http://fancycamperhomebrew.com/uploads/1/3/0/9/130969648/safener.pdfIn PDF document text
    • http://zypora.com/uploads/1/3/1/3/131398193/4c345e8e9e9.pdfIn PDF document text
    • http://januarioassociados.com/uploads/1/3/1/4/131453402/fogijujowadi_pixujoxarewu_zinujove_vurup.pdfIn PDF document text
    • http://rededemidias.net/uploads/1/3/0/8/130874223/togegepobu-suxuker-kusesamozoji.pdfIn PDF document text
    • http://htwatts.com/uploads/1/3/0/4/130483338/8907696.pdfIn PDF document text
    • http://cofrefinanciero.com/uploads/1/3/0/6/130604563/2973802.pdfIn PDF document text
    • http://moringanutritional.com/uploads/1/3/0/7/130739147/8229778.pdfIn PDF document text
    • http://amherstlaserwellnesscenter.com/uploads/1/3/0/7/130775130/8b7a049fb48.pdfIn PDF document text
    • http://auralady.com/uploads/1/3/0/7/130776824/6899335.pdfIn PDF document text
    • http://finsenselimited.org/uploads/1/3/0/4/130476065/9902482.pdfIn PDF document text
    • http://jcfishstand.com/uploads/1/3/0/7/130739392/fozusubuju_fijiwata_pujami_dejuloxikaveja.pdfIn PDF document text
    • http://turquoiseheartphotography.com/uploads/1/3/1/1/131164054/kejizivopok.pdfIn PDF document text
    • http://tamzinmuir.com/uploads/1/3/0/3/130313026/talezibudaxebanon.pdfIn PDF document text
    • http://wisconsinweddingmusic.com/uploads/1/3/0/5/130543472/xanaz_gejonofuvaxuko.pdfIn PDF document text
    • http://ninety-percent.com/uploads/1/3/0/5/130589140/zapuxag.pdfIn PDF document text
    • http://handmadeloraine.com/uploads/1/3/0/9/130969548/6762128.pdfIn PDF document text
    • http://greshamheadshots.com/uploads/1/3/0/6/130621473/f60ee3682.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 4

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_off00007c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C13 8084 bytes
SHA-256: 2e7681a57e2aec8fcda3f146ff749f1aa31e95bd7c019fb165290992d3d63c17

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