Malicious PDF — malware analysis report

Static analysis result for SHA-256 74fce101604199e3…

MALICIOUS

PDF

50.1 KB Created: 2020-04-03 00:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 67a49294f7d123cf64a6718ada456a12 SHA-1: 7fc85a41cd98fb8ae06fddb322242251ee6196ad SHA-256: 74fce101604199e37273047b43b04d15514dd5635f77b04c4d421af7de137226
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a mechanism to distribute further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the observed link farm behavior. No scripts were extracted, and the document body is largely unreadable binary data.

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://cmk-solutions.com/uploads/1/3/1/4/131483234/131483234.html#ygs+anlat%C4%B1m+bozukluklar%C4%B1+%C3%A7%C4%B1km%C4%B1%C5%9F+soru
    • http://pilatetheplay.com/uploads/1/3/0/6/130621460/cc4df6.pdf
    • http://searchiversity.com/uploads/1/3/0/2/130272372/3545370.pdf
    • http://ndsucceed.com/uploads/1/3/0/5/130551770/tiwoduritabud.pdf
    • http://cambcollege.com/uploads/1/3/0/5/130588701/7189648.pdf
    • http://foodlovetravel.com/uploads/1/3/0/2/130272347/xajap.pdf
    • http://superiorplanthire.com/uploads/1/3/0/5/130588796/5040534.pdf
    • http://stonefloors1.com/uploads/1/3/0/6/130640219/xemedipak.pdf
    • http://thesanctuaryofcapecod.com/uploads/1/3/1/3/131384336/mezefilutizasexeris.pdf
    • http://friedmannfamilyreunion2020.com/uploads/1/3/0/6/130639223/6f47d.pdf
    • http://bettertogether.press/uploads/1/3/1/3/131383679/zupowo.pdf
    • http://petra-sieraad.nl/uploads/1/3/1/1/131164246/8ef8ef69c2.pdf
    • http://kxsystems.com/uploads/1/3/0/3/130323567/4234345.pdf
    • http://dynamiccorestrategies.com/uploads/1/3/1/3/131381910/84938885b5.pdf
    • http://peterinchains.com/uploads/1/3/0/7/130775342/wizejikafomozi_xoramo.pdf
    • http://makkahwellness.com/uploads/1/3/0/4/130490019/9699405.pdf
    • http://princessponyclub.com/uploads/1/3/0/6/130620788/5070433.pdf
    • http://covingtoncultureclub.com/uploads/1/3/0/8/130874142/veluwoxega.pdf
    • http://quoteraider.com/uploads/1/3/1/3/131384082/fonokokabarexe_vawojuzodiseva.pdf
    • http://mrscottcaudill.com/uploads/1/3/0/5/130590738/5352102.pdf
    • http://lymphaticmassageofpensacola.com/uploads/1/3/0/4/130483634/6721376.pdf
    • http://mjacoby88.com/uploads/1/3/0/6/130604276/xilawigutosinurijaj.pdf
    • http://bestbikevidz.com/uploads/1/3/0/7/130775634/8fe9964a72.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000095b3.bin
5a1db7601b3cb7d3261f396b51e9a1d9ff0f3d46d3d849ec4502bf0d8e35c20b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95B3 10196 bytes

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