Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e1fc1fdd2239d14…

MALICIOUS

PDF

41.1 KB Created: 2020-03-07 12:53:53 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a1623ea6c5ae015dd433c11ecd105e96 SHA-1: bd2d599999423eae4c9c97cf26cce7acfc459876 SHA-256: 0e1fc1fdd2239d149e9203538f646e0950c86d29510c66f8a10e3c020cf46a42
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, many of which are hosted on newly registered domains and appear to be part of a link farm. The document body, though heavily obfuscated, contains references to merging PDFs and includes URLs that are likely used for phishing or distributing further malicious content. The ML classifier strongly indicated maliciousness, supporting the assessment of a malicious PDF designed for user redirection.

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://x0807796xstreamtravel.xsideas.com/uploads/1/3/0/5/130590577/130590577.html#merge+pdf+without+pro
    • http://dealswithdessy.com/uploads/1/3/0/3/130313422/rejanoget-daxojujewinof-lasox.pdf
    • http://easybillpro.com/uploads/1/3/0/6/130604601/davivafewo_mivalunamexe_vovezumawo_xaxoxotigige.pdf
    • http://midicicastlerock.com/uploads/1/3/0/5/130550655/fevafogurat.pdf
    • http://bethanyfancypetsupply.com/uploads/1/3/0/7/130738759/cdbe3de1.pdf
    • http://rudywalkerofficial.com/uploads/1/3/0/5/130551087/ludimege.pdf
    • http://shanahanagency.com/uploads/1/3/0/4/130483515/tekubuza_gupawusevoxat_vamovewi_suxuz.pdf
    • http://environmentallearningcenter.org/uploads/1/3/0/2/130270747/ritozid.pdf
    • http://universalpeers.com/uploads/1/3/0/2/130289336/b464c5d98f.pdf
    • http://www.caucasianovcharka.org/uploads/1/3/0/4/130488331/7227710.pdf
    • http://meliciosa.com/uploads/1/3/0/7/130738564/4f225eafe29b01.pdf
    • http://mx.climatechangecoffee.com/uploads/1/3/0/3/130313088/4558738.pdf
    • http://www.borundaengineering.com/uploads/1/3/0/8/130813818/5956279.pdf
    • http://houseenvy.com/uploads/1/3/0/7/130738779/nixarerujos_gereniriz_lavep_vebotukojut.pdf
    • http://beezneezsausages.com/uploads/1/3/0/7/130739351/615670.pdf
    • http://www.bhsathleticboosters.org/uploads/1/3/0/6/130639419/difanur_fuxamen_sitalikowexej_debug.pdf
    • http://funandsun.org/uploads/1/3/0/5/130551697/fesesuzaberax-segan.pdf
    • http://nordicatravel.net/uploads/1/3/0/6/130604113/7375864.pdf
    • http://rshawillustrations.com/uploads/1/3/0/6/130621893/a4c238b170.pdf
    • http://indiagvalentin.com/uploads/1/3/0/7/130775174/cb40ccdb.pdf
    • http://www.letstalkspeechtherapy.net/uploads/1/3/0/2/130271250/6903832.pdf
    • http://agnseguridadlaboral.com/uploads/1/3/0/5/130589260/70f669d0cf4fb90.pdf
    • http://ladybugpestcontrolllc.com/uploads/1/3/0/8/130814902/kadew-pejewoxov-mireraluk.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_off00007686.bin
751ee8f1e1c994e02d745afc5c6381d2b41af84643357c0c515ed13d4c2eca8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7686 8540 bytes

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