Malicious PDF — malware analysis report

Static analysis result for SHA-256 b380f5f3ddb43767…

MALICIOUS

PDF

34.9 KB Created: 2020-06-04 17:39:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-15
MD5: 63fab974be25afeb0005fc069d949223 SHA-1: 25158b2795f22c144a34180cf561f035a6908240 SHA-256: b380f5f3ddb437678ce5317255072816c16b3832a9cc20d443a22ddf850b2512
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 hosted on various domains. The document body text and embedded URLs suggest a lure related to downloading a 'reloading handbook', which is a common tactic for distributing malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, likely for SEO poisoning or to host a large number of malicious files. 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://spisale.com/uploads/1/3/0/2/130288600/130288600.html#lyman+49th+edition+reloading+handbook+pdf+download PDF link annotation
    • http://caletaylor.com/uploads/1/3/0/9/130969415/lanasinapedemapa.pdfIn PDF document text
    • http://redhead98.net/uploads/1/3/0/7/130776684/372f822f2174c4b.pdfIn PDF document text
    • http://rosebenaturals.com/uploads/1/3/0/8/130874365/zawasedita_vuluxabapipiluf_jitabonuse_jaweden.pdfIn PDF document text
    • http://uncomplicateparenting.com/uploads/1/3/0/6/130620607/jevejewegate_pupimaworokago.pdfIn PDF document text
    • http://firsttimeinkenya.org/uploads/1/3/0/4/130476575/5542314.pdfIn PDF document text
    • http://webmail.hermitagefbc.com/uploads/1/3/0/6/130621455/f8029d60c.pdfIn PDF document text
    • http://spisale.com/uploads/1/3/0/2/130288600/terms.htmlIn PDF document text
    • http://spisale.com/uploads/1/3/0/2/130288600/dmca.htmlIn PDF document text
    • http://spisale.com/uploads/1/3/0/2/130288600/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://safowus.files.wordpress.com/2020/06/80389467993.pdfIn PDF document text
    • https://taxasegino.files.wordpress.com/2020/06/63290134170.pdfIn PDF document text
    • https://numafudip544870020.files.wordpress.com/2020/06/napekozetunazowebafo.pdfIn PDF document text
    • https://mukagalezep.files.wordpress.com/2020/06/54094213811.pdfIn PDF document text
    • https://piputefanag.files.wordpress.com/2020/06/64476133804.pdfIn PDF document text
    • https://tuwokovi.files.wordpress.com/2020/06/65605585618.pdfIn PDF document text
    • https://kaxatesuv.files.wordpress.com/2020/06/7614828294.pdfIn PDF document text
    • https://valunip.files.wordpress.com/2020/06/kogakodife.pdfIn PDF document text
    • https://munedit.files.wordpress.com/2020/06/4138638905.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 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_off00005a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8E 10660 bytes
SHA-256: 5f3ec6f955f3f56586e1a417eaabc7c4bf5d506a7cfafee06348b3a7fbfbbce1

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