Malicious PDF — malware analysis report

Static analysis result for SHA-256 91128edf96b884ab…

MALICIOUS

PDF

39.4 KB Created: 2020-04-15 21:18:58 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-15
MD5: 7793c442fc62e8f333c3634a587cdfc3 SHA-1: 6341e41a8fb73a262f480184314e3f63253f2562 SHA-256: 91128edf96b884abf0475e879e1f46f962eda3a5e8f29b6f075f8bab709bcccd
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, as indicated by the PDF_SEO_LINK_FARM heuristic. The primary URL found is http://deceptivelysimple.com/uploads/1/3/0/6/130639418/130639418.html#lagu+betrayer+bendera+kuning+versi+baru. This suggests the document is designed to redirect users to a network of other sites, likely for SEO spam or to distribute further 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://deceptivelysimple.com/uploads/1/3/0/6/130639418/130639418.html#lagu+betrayer+bendera+kuning+versi+baru PDF link annotation
    • http://9f62dcb150.com/uploads/1/3/0/3/130313191/c709f7e.pdfIn PDF document text
    • http://connorcopelandcreative.com/uploads/1/3/0/6/130639511/5530888.pdfIn PDF document text
    • http://restorativejuveniledetention.org/uploads/1/3/0/6/130639513/413b524e75d6d30.pdfIn PDF document text
    • http://orionfolio.com/uploads/1/3/0/2/130289262/6466883.pdfIn PDF document text
    • http://padrejoseblog.com/uploads/1/3/1/4/131437743/piresoma.pdfIn PDF document text
    • http://coecustomfirearms.com/uploads/1/3/0/8/130813866/solazepatuwusosuga.pdfIn PDF document text
    • http://kimsbookstore.com/uploads/1/3/0/6/130604306/lilanedurer.pdfIn PDF document text
    • http://rainstorms.org/uploads/1/3/0/2/130271234/cc3033ff7ab16e.pdfIn PDF document text
    • http://rabbirenee.com/uploads/1/3/0/7/130740196/wogeluba_tezigipibop_piwumok.pdfIn PDF document text
    • http://thenightmarehauntedhouse.com/uploads/1/3/1/3/131383629/5ae33cd6c.pdfIn PDF document text
    • http://link-vm.com/uploads/1/3/0/6/130639226/dogupepazedunod-wizubomagidep-lidikineb-wuvasajonobul.pdfIn PDF document text
    • http://livingwatermichigan.com/uploads/1/3/0/6/130620798/silikapu.pdfIn PDF document text
    • http://khourybros.info/uploads/1/3/1/3/131384226/sorejuwol-bukimixipuwa-wuvonaropukofi-vabutawokadi.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_off0000668f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x668F 8140 bytes
SHA-256: 15457d048b9516d31996159217cbcc91fc5eb34a4671a083efa73671e0a5fa7f
font_01_sfnt_off0000861a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x861A 2616 bytes
SHA-256: d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04

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