Malicious PDF — malware analysis report

Static analysis result for SHA-256 391bed2b04151261…

MALICIOUS

PDF

41.7 KB Created: 2020-03-31 00:38:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0c20c5f50b91b8f5178f567f500f1db3 SHA-1: 00a1c2cf0c7adc30f817ddb66a6933a4eee718a1 SHA-256: 391bed2b04151261a61311926497de67e07e8594e5404d5a0a6d9d224fb88145
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The document body text, though partially corrupted, includes the phrase 'Q es condensacion del agua' and references the wkhtmltopdf tool, suggesting a potential lure related to water condensation, possibly to disguise the malicious intent of redirecting users to a link farm.

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://edgelandscapeandmaintenance.com/uploads/1/3/1/4/131407698/131407698.html#q+es+condensacion+del+agua
    • http://steamcleanersrus.com/uploads/1/3/0/6/130639407/takaxejoxakeradabur.pdf
    • http://taysidegrooming.com/uploads/1/3/0/7/130776594/bopimopu.pdf
    • http://districtvba.com/uploads/1/3/0/6/130640114/88f7d8c40d3fb8a.pdf
    • http://activobrest.com/uploads/1/3/1/0/131069970/1513787.pdf
    • http://bibleandbedhead.com/uploads/1/3/0/7/130738989/2e33d546.pdf
    • http://wildmushroom.org/uploads/1/3/0/6/130639540/bigebopares.pdf
    • http://yourprpath.com/uploads/1/3/0/9/130969791/2970079.pdf
    • http://cbdsandy.com/uploads/1/3/0/7/130775649/jozedana.pdf
    • http://findingvicki.com/uploads/1/3/0/5/130588564/ac7b095d3e3db42.pdf
    • http://skeetersprayer.com/uploads/1/3/0/6/130604427/3069247.pdf
    • http://liquorlawsvt.net/uploads/1/3/0/7/130776279/pakugiketu-sepulufojeso-dobotova-dovumibogani.pdf
    • http://celebritylace.com/uploads/1/3/1/3/131381352/9e182be97707.pdf
    • http://paulgilmourphotography.com/uploads/1/3/0/5/130551619/lekesurefeno_xaxap_pibumufotogiz_fidimoboru.pdf
    • http://retirementnesteggcalculator.com/uploads/1/3/0/4/130488399/6907417.pdf
    • http://newcoitalia.net/uploads/1/3/1/3/131379324/jutegudufisenag_rabojituxi.pdf
    • http://jardinerastudio.com/uploads/1/3/0/5/130544811/4778d5b.pdf
    • http://dynamite.coffee/uploads/1/3/0/7/130740262/ropuzuravujexotikise.pdf
    • http://populiteracy.com/uploads/1/3/0/6/130604566/0194aedecc0.pdf
    • http://southamericarealstate.com/uploads/1/3/0/6/130604527/didowimafik-jejuwevonugu.pdf
    • http://mdprtnrs.com/uploads/1/3/0/3/130379844/jukotax-vebasedetog.pdf
    • http://eleancia.com/uploads/1/3/0/4/130483477/kagosiwe.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_off000078f5.bin
8bdaae49b95fb75d65ea3c9d22ec6ce8e75c5527a8e138e5673f3bb4f0af26a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F5 8584 bytes

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