Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd89632eb30747e…

MALICIOUS

PDF

41.7 KB Created: 2020-05-07 13:29:00 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 252c14de45cbb22dec49ac40a138a27d SHA-1: a43a90e5ff422d9710b84dcc54575868820aa7ec SHA-256: 6dd89632eb30747e0b78d43444012e3b763ca71a220556eadd69e062f74522d0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are numerically or generically named PDFs, suggesting a link farm or SEO poisoning tactic. The document body, though heavily obfuscated, contains references to a tent manual and includes URLs that appear to be part of this link farm. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious nature of the embedded 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://yogalifesf.com/uploads/1/3/0/2/130270980/130270980.html#ozark+trail+8+person+tent+manual
    • http://spanishtranslationlancaster.com/uploads/1/3/0/5/130590770/8704597.pdf
    • http://annahighcountry.com/uploads/1/3/0/7/130775832/c06487a.pdf
    • http://pjspainting.com/uploads/1/3/1/3/131380868/40a610508951.pdf
    • http://australianhr.com/uploads/1/3/0/2/130289271/bdf7f559.pdf
    • http://realmisterketo.com/uploads/1/3/0/6/130604931/nalirujum-bozuvis-paritiwemupaz.pdf
    • http://restorationridesllc.com/uploads/1/3/0/5/130546486/dagopifo_mosomepikejej_pexaxadofi.pdf
    • http://bperfectgels.org/uploads/1/3/0/5/130589450/c94a223e.pdf
    • http://christybakerlaw.com/uploads/1/3/0/6/130620402/sijunaxutonona_mizemuzaji_goxedezovulefup_sumapemez.pdf
    • http://yaredimmtratax.com/uploads/1/3/0/8/130813511/9177326.pdf
    • http://abetterbirthny.com/uploads/1/3/0/6/130639368/6891609.pdf
    • http://mkmconcessions.com/uploads/1/3/1/4/131408465/nedoxizufij_logisibarino_panilibivobusoz.pdf
    • http://dealsrgreat.com/uploads/1/3/0/8/130814735/javasunesunire-xovenasulasit-bokijux.pdf
    • http://donorchardphotography.com/uploads/1/3/1/3/131384286/f98b3a7d264a.pdf
    • http://culturalovers.org/uploads/1/3/0/6/130639456/xagasosufe.pdf
    • http://jboutdoordesigns.com/uploads/1/3/1/6/131606746/a7ea2f.pdf
    • http://workzonetcm.com/uploads/1/3/1/4/131406698/zubimut-xoganirase-dutidapafu-kuduxi.pdf
    • http://kreativstueberl.com/uploads/1/3/1/4/131407922/2575546.pdf
    • http://xinnovate.org/uploads/1/3/1/3/131379060/9685483.pdf
    • http://milborneassociates.com/uploads/1/3/1/4/131410736/ruwobivukilofu.pdf
    • http://suiteroomsalesconsulting.com/uploads/1/3/0/7/130739944/bibaludolawer.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007699.bin
ceae5dea504162af39d64cb3a9d37267260f30484e7b3d28ce18dfa4d8e8f588		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7699 10936 bytes

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