Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e7e5ef5b5652fd3…

MALICIOUS

PDF

36.4 KB Created: 2020-05-13 22:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: db18b5769a6f63de8ba293f5e06cd7da SHA-1: 9e655515c52643da78734b91aa98bcdc0a5ea85d SHA-256: 6e7e5ef5b5652fd39aeb8fd159d2c92f154c167f220887b84bc4e967c532d085
96 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing a large number of external URLs pointing to various domains. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of numerous links. The document body, though heavily obfuscated, contains some of the same URLs, suggesting an attempt to manipulate search engine results or redirect users to potentially harmful content. No scripts were extracted, but the sheer volume of external links is highly suspicious.

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://maiereducationalconsultants.com/uploads/1/3/0/3/130323185/130323185.html#lamborghini+new+song++djpunjab
    • http://passionatedoula.com/uploads/1/3/0/6/130640021/c867d6f1b1b00.pdf
    • http://thingz4u.com/uploads/1/3/1/4/131409841/logoxased.pdf
    • http://tacomawindowcleaner.com/uploads/1/3/0/7/130776253/7d1a877aef2.pdf
    • http://farmers-market-shop.com/uploads/1/3/1/4/131410311/susojuxoxelovu.pdf
    • http://hillsborohomeforsale.com/uploads/1/3/1/3/131379045/9359723ed5a315.pdf
    • http://thelongevityclock.com/uploads/1/3/1/4/131454883/regexukin.pdf
    • http://johnandsarabacon.com/uploads/1/3/1/8/131856987/a80fec005f84e.pdf
    • http://amywhitaker.me/uploads/1/3/0/8/130874676/9778666.pdf
    • http://compassioncounseling.info/uploads/1/3/0/8/130874437/693c1a47ba96b.pdf
    • http://joshua-berg.com/uploads/1/3/1/3/131380177/posinamiriwazon.pdf
    • http://chevy02.site/uploads/1/3/0/5/130545429/mopesaduguzuk_sizimudodutu_sekowewovutofot.pdf
    • http://invisiblekidsdocumentary.com/uploads/1/3/0/6/130605442/0315957f4e40b7f.pdf
    • http://rachelcarusobryant.com/uploads/1/3/0/5/130546196/gusopib_fadigum.pdf
    • http://whiteroseartstudio.com/uploads/1/3/1/4/131453221/muvowulorimasar.pdf
    • http://empoweringlifes.com/uploads/1/3/0/2/130291689/bf21173b4e.pdf
    • http://preciouscrumbs.com/uploads/1/3/0/7/130738738/jipadulibipogaw-nitigagu-nalalo-jejelidatom.pdf
    • http://stocktonbaseballclub.com/uploads/1/3/0/4/130483045/5e03795cbfeff1b.pdf
    • http://kornartworks.com/uploads/1/3/1/4/131406741/tuzoxus-razotopedu.pdf
    • http://islanddukkha.com/uploads/1/3/0/7/130738644/4315206.pdf
    • http://drjoycesskincaresystems.com/uploads/1/3/0/8/130874162/guxixigabedoxinixoga.pdf
    • http://evershoreenvironmentalinc.org/uploads/1/3/0/4/130436222/jimarasorasowij_puboxafelosa_lulexajake.pdf
    • http://pocketfulofgratitude.com/uploads/1/3/0/5/130589189/7640648.pdf
    • http://taylorconjure.com/uploads/1/3/1/3/131380177/1280615.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/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://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006444.bin
85ff183e00b6541d192af7a8eac5ff3307216c11f144488ed20dfd688e76e255		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6444 9552 bytes

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