Malicious PDF — malware analysis report

Static analysis result for SHA-256 b123ab92b7aa2d32…

MALICIOUS

PDF

39.8 KB Created: 2020-06-29 01:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 4df64a15287d68af62c30ce7edf16fc3 SHA-1: d5d9c3cb5c93cda7c8249986606a0fe5089dbd0e SHA-256: b123ab92b7aa2d325cb85a2076689d0649d2f53d63303674c7edeb6fee275b9a
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text related to 'Eeoc guidelines for hiring felons' and includes many of the same URLs found in the heuristics. These links likely serve as a lure to redirect users to potentially malicious websites or to manipulate search engine rankings.

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://files.katrinarecoveryquilts.org/uploads/1/3/0/7/130739483/130739483.html#eeoc+guidelines+for+hiring+felons PDF link annotation
    • http://thesageoftime.com/uploads/1/3/0/4/130477455/1095088.pdfIn PDF document text
    • http://concretejetskisllc.com/uploads/1/3/0/4/130476703/8a379338c4.pdfIn PDF document text
    • http://files.stampedconcretevancouverbc.com/uploads/1/3/0/6/130621905/f7f3df6cb37ee79.pdfIn PDF document text
    • http://files.utaheagleforum.us/uploads/1/3/0/3/130379549/jadizugobivolizowe.pdfIn PDF document text
    • http://90sera.net/uploads/1/3/1/4/131413603/notulufuba-sudegekezovem.pdfIn PDF document text
    • http://myequineeducation.com/uploads/1/3/0/3/130313054/vumulimijozetenob.pdfIn PDF document text
    • http://files.supercontinent-bp.com/uploads/1/3/0/5/130546457/ab86e3fc9c1.pdfIn PDF document text
    • http://files.stlspanishclasses.com/uploads/1/3/1/3/131381045/sixokufame.pdfIn PDF document text
    • http://hostmaster.thinwhitecube.eu/uploads/1/3/0/6/130604499/7411851.pdfIn PDF document text
    • http://mail.stpeterstw.com/uploads/1/3/0/7/130739601/pibekuvimipul.pdfIn PDF document text
    • http://quarryhillsanimalhospital.preview.pethealthnetworkpro.com/uploads/1/3/0/4/130489128/15979.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://diwonejivu.files.wordpress.com/2020/06/65024849089.pdfIn PDF document text
    • https://rumibut.files.wordpress.com/2020/06/53475240507.pdfIn PDF document text
    • https://rumudorav.files.wordpress.com/2020/06/98243225162.pdfIn PDF document text
    • https://pusivogik.files.wordpress.com/2020/06/27796203278.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://scripts.sil.org/OFLIn 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_off0000601c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601C 4832 bytes
SHA-256: 4bf1d37e34cf25965793cabb4c0e9eeb1e9923b0baba18588d6946c1c8c62e05
font_01_sfnt_off00007073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7073 10044 bytes
SHA-256: d12684a78ebdae3226450adf1d2e0110170e7d94cec789ebf4bd2cd33eeea4b6

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