Malicious PDF — malware analysis report

Static analysis result for SHA-256 13362a19d5958805…

MALICIOUS

PDF

46.2 KB Created: 2020-04-03 09:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bf3c230f936d615e0eb8a0a794ea1d2e SHA-1: b15f8e7c7c62d985247e1450e24c3c15fa8f18d2 SHA-256: 13362a19d5958805edde13b38f7d6c2be10bf4495ff374ab4617bd8541011774
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, identified by the 'PDF_SEO_LINK_FARM' heuristic, suggesting a link farm or distribution mechanism. The document body mentions 'Kenmore 400 series dryer belt', likely a lure to disguise the malicious intent. While no scripts were directly extracted, the presence of numerous external links and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful content.

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://lhugginslawllc.com/uploads/1/3/0/7/130740444/130740444.html#kenmore+400+series+dryer+belt
    • http://optimumfamilyservicesllc.net/uploads/1/3/0/5/130551369/6c28500.pdf
    • http://topfloorsdesign.com/uploads/1/3/0/7/130775520/8971932.pdf
    • http://www.skycaptainsocial.com/uploads/1/3/0/5/130551091/753295.pdf
    • http://airyfitness.com/uploads/1/3/0/7/130740524/f2c230ee0b.pdf
    • http://i7tennohyd.com/uploads/1/3/0/6/130639709/262b5f20afd.pdf
    • http://rtpliving.com/uploads/1/3/0/5/130588744/bazetafas_mogugutosinila_pofetososurulos.pdf
    • http://sincerelycam.com/uploads/1/3/1/3/131383251/zizosudomokonuwek.pdf
    • http://nordphi.com/uploads/1/3/1/3/131382346/rasasadupun.pdf
    • http://shorerentalsmd.com/uploads/1/3/0/9/130969865/cb4ec2fd7050.pdf
    • http://mhsorchestra.org/uploads/1/3/0/5/130543848/medagiz_vagizaretet_nitiruwizusup.pdf
    • http://electbutchlawter.com/uploads/1/3/0/7/130738662/1af3cd1.pdf
    • http://smojosmoothies.com/uploads/1/3/1/3/131397974/gakenuloru-gazotudenowip.pdf
    • http://10000licks.net/uploads/1/3/1/3/131381946/4964373.pdf
    • http://lunasconstruction.net/uploads/1/3/0/5/130539316/2144294.pdf
    • http://beasleyhomes.com/uploads/1/3/0/5/130588304/6aec03.pdf
    • http://nuggetcatcher.com/uploads/1/3/0/6/130620508/gafawujesevakixesi.pdf
    • http://bobcatndopen.org/uploads/1/3/0/7/130776035/9251011.pdf
    • http://jbco.org/uploads/1/3/0/6/130620606/sanozajab.pdf
    • http://metaldesings.com/uploads/1/3/0/5/130541356/7032137.pdf
    • http://bbmslaw.com/uploads/1/3/0/7/130776183/c05f19ae71c277.pdf
    • http://theyellowrabbit.com/uploads/1/3/0/5/130550876/nufudixiwijukewi.pdf
    • http://genesisclothes.com/uploads/1/3/0/6/130603710/rarejemeriluvuguves.pdf
    • http://unicityguide.com/uploads/1/3/0/8/130873737/5c51ae3c.pdf
    • http://kryanjenkins.shop/uploads/1/3/1/0/131070485/564bb701eb55876.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000765a.bin
8a47063d2c5743b516c1239b67218314850480b269aff25e12dad52f19608b9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x765A 7856 bytes
font_01_sfnt_off00009514.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9514 16204 bytes

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