Malicious PDF — malware analysis report

Static analysis result for SHA-256 92348c204a92d208…

MALICIOUS

PDF

42.6 KB Created: 2020-03-13 05:15:30 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e2f058b68e341ff44cdc0cedb90268c8 SHA-1: f7e20ef9764e97c85a909464c153de7188ac6d9f SHA-256: 92348c204a92d2088811641a59d442901c0f30977cbd57ec1aa5728b1dd9d552
96 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, generating numerous SEO-optimized links to external PDF documents hosted on various domains. The ML classifier strongly indicated maliciousness. The primary attack pattern involves directing users to a network of potentially malicious or spam-related content through these links.

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://alliwantconference.net/uploads/1/3/0/5/130544447/130544447.html#cerebral+palsy+baclofen
    • http://iteroimplantdentallab.com/uploads/1/3/0/3/130313376/zoxegudo.pdf
    • http://atlantadrummethod.com/uploads/1/3/0/3/130313718/97c5c6.pdf
    • http://mx.westminsterprez.org/uploads/1/3/0/5/130590656/08e12e41.pdf
    • http://www.walkertrailerequipment.com/uploads/1/3/0/6/130604770/vunewakima.pdf
    • http://dentalassistingcoach.com/uploads/1/3/0/9/130969576/tonupuvatavuxevul.pdf
    • http://cleanoutcavalry.net/uploads/1/3/0/3/130323212/tukorimofu.pdf
    • http://nijacode.com/uploads/1/3/0/7/130740497/9887638.pdf
    • http://www.prime-property-investments.com/uploads/1/3/0/8/130814672/galulufexusuv.pdf
    • http://uniquelycoordinatedevents.com/uploads/1/3/0/8/130814189/12d5c5b5ee3.pdf
    • http://kkpsithetaepsilon.org/uploads/1/3/0/5/130588195/6551763.pdf
    • http://ruiwang.us/uploads/1/3/0/2/130292143/porow.pdf
    • http://panoconsultinggoup.com/uploads/1/3/0/6/130604521/2968111.pdf
    • http://74-123-78-196.mgwnet.com/uploads/1/3/0/6/130639848/8271157.pdf
    • http://pfeiferhomeinspections.com/uploads/1/3/0/6/130639258/982128.pdf
    • http://hostmaster.artifx.org/uploads/1/3/0/8/130874393/zikegow_vefasojemenekel_wobarivetezod.pdf
    • http://tinytreeherbfarm.org/uploads/1/3/0/6/130604962/mawazelim_zevelixagenuk_dobed_fulifuma.pdf
    • http://www.cgpl.fr/uploads/1/3/0/5/130551130/tetawoku.pdf
    • http://www.huskieeats.com/uploads/1/3/0/6/130603995/jewumejigojexit_panobedano_firewibupis.pdf
    • http://colombohockey.com/uploads/1/3/0/7/130776676/lesejadene-pozidarofez-liwube-wezapodow.pdf
    • http://widelystreams.com/uploads/1/3/0/6/130604815/sokorami.pdf
    • http://fulltimemobiledad.com/uploads/1/3/0/7/130740510/8026605.pdf
    • http://motodroid.net/uploads/1/3/0/7/130738676/0a0765bb.pdf
    • http://www.yogata.org/uploads/1/3/0/6/130621196/8933349.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_off00008001.bin
ac82da3cd67f1ef421a406f0cc34d51357218e906ec49acd3039c8598dafe6fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8001 7352 bytes

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