Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8034d3ebf6bd138…

MALICIOUS

PDF

71.4 KB Created: 2020-04-01 23:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 8ef4ded091b45ad341350364c3375825 SHA-1: c2f09c5dc93182e68b7bc32765deeb51abaa3da4 SHA-256: c8034d3ebf6bd138c65c24c844c371881ab4336802a5489cb4813b58a3f8edfc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to other PDF files with numeric or keyword-based slugs, indicating a link farm or SEO spam strategy. One of the embedded URIs, 'http://thinkflicks.org/uploads/1/3/0/4/130483582/130483582.html#ragnarok+mage+guide+leveling', suggests a lure related to online gaming guides. The heuristic 'PDF_SEO_LINK_FARM' confirms the presence of numerous external links designed to manipulate search engine results. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://thinkflicks.org/uploads/1/3/0/4/130483582/130483582.html#ragnarok+mage+guide+leveling PDF link annotation
    • http://sts-florida.net/uploads/1/3/0/8/130813651/2a4ff5f.pdfIn PDF document text
    • http://heartyway.com/uploads/1/3/0/4/130489346/gujedoxofalib-tevusurimugog-debak.pdfIn PDF document text
    • http://mta-sts.mx.amenkolache.com/uploads/1/3/0/6/130604944/7de6ca6.pdfIn PDF document text
    • http://armcushies.com/uploads/1/3/0/2/130270979/xenavekinixilab.pdfIn PDF document text
    • http://samuelyi.com/uploads/1/3/0/6/130639774/belolejetige.pdfIn PDF document text
    • http://nabajal.org/uploads/1/3/0/6/130639291/junowugakimila-mibopegad-wuwidamugopew-runavexazov.pdfIn PDF document text
    • http://rockingvskirtsandtees.com/uploads/1/3/0/4/130483270/9305225.pdfIn PDF document text
    • http://cmwatson.com/uploads/1/3/1/0/131071019/263f3.pdfIn PDF document text
    • http://prototourism.org/uploads/1/3/0/5/130539659/kolebusezowafa-kipubabe-lusenepiduwe-roxemevorej.pdfIn PDF document text
    • http://seacreaturesandwich.com/uploads/1/3/1/3/131379360/podobata.pdfIn PDF document text
    • http://myndscentcompany.com/uploads/1/3/0/7/130740231/kugexusaraver-tomimi-zotod-kexevenes.pdfIn PDF document text
    • http://toodue.net/uploads/1/3/0/3/130313167/gojuxe_wafosomogeki_lepofuwi_wimixezedigox.pdfIn PDF document text
    • http://enricorobusti.com/uploads/1/3/0/5/130551675/5088927.pdfIn PDF document text
    • http://honeyhopfarm.com/uploads/1/3/0/6/130639438/nozoxapiwo.pdfIn PDF document text
    • http://blushbyupdos.com/uploads/1/3/0/6/130604885/zameg.pdfIn PDF document text
    • http://saraschenkeillustration.com/uploads/1/3/0/6/130603763/7da3551.pdfIn PDF document text
    • http://bynanajaja.com/uploads/1/3/1/1/131163787/fapiwivefupose.pdfIn PDF document text
    • http://boomwerkendebever.be/uploads/1/3/0/5/130551191/3429773.pdfIn PDF document text
    • http://glolures.com/uploads/1/3/0/6/130620390/wututamu-likad-wufakuvesogi-dumor.pdfIn PDF document text
    • http://timparkin.solutions/uploads/1/3/0/7/130739583/2240580.pdfIn PDF document text
    • http://theaterworx.info/uploads/1/3/0/2/130289222/wenotude.pdfIn PDF document text
    • http://viningssquare.com/uploads/1/3/0/4/130488750/8890144.pdfIn PDF document text
    • http://justindorourke.com/uploads/1/3/0/8/130874318/9395876.pdfIn PDF document text
    • http://npcpasolutions.com/uploads/1/3/0/8/130873899/6347151.pdfIn PDF document text
    • http://greenharvestnorthwest.com/uploads/1/3/0/8/130874126/4062626.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
🗂 Part of campaign: myndscentcompany.com 3 samples

Related samples 1

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Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B0 7996 bytes
SHA-256: a98cfe8e5de885fbc52e8127a5e09ac438439efab47c508e5159a959edf942a4

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