Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5d94168dd5ddaaf…

MALICIOUS

PDF

36.3 KB Created: 2020-04-02 17:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f3ce1ed595f218182c28153049429ef9 SHA-1: 4eb722f83aacce9e569819424423a1ed022e7846 SHA-256: d5d94168dd5ddaaf5f75add23da8eb289d73017048b75f0073df1064c682f2e2
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, contains text related to a lab report and mentions external URLs. The primary function appears to be directing users to a vast network of other websites, likely for SEO spam or to host further malicious 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://wildlifecarerstoowoombaregion.com/uploads/1/3/0/4/130483860/130483860.html#modified+atwood+machine+lab+report
    • http://monarchtherapy.us/uploads/1/3/0/2/130291910/3335269.pdf
    • http://jessieilinchen.com/uploads/1/3/0/6/130639839/zukifabafagajevek.pdf
    • http://stayhomehair.com/uploads/1/3/0/5/130539179/zopagizanojidewimur.pdf
    • http://lenka-photography.com/uploads/1/3/0/6/130605389/4151500.pdf
    • http://bestfriendsbakery.net/uploads/1/3/0/7/130740033/bigomuwolepiwug_meravimud_toxiwiwipulag.pdf
    • http://carbidetix.com/uploads/1/3/0/6/130639574/veloramoxipaw.pdf
    • http://zuluaga8.com/uploads/1/3/0/6/130604255/c7549293a3f32.pdf
    • http://anishandshiny.org/uploads/1/3/1/3/131380625/6318232.pdf
    • http://demcancon.org/uploads/1/3/0/5/130550787/pubodixowor_rokevewod_wulusojuwuko.pdf
    • http://2kgcasting.com/uploads/1/3/1/3/131381839/98b6f.pdf
    • http://riannehawkins.com/uploads/1/3/0/8/130813646/6424349.pdf
    • http://ultimatewaxspot.com/uploads/1/3/0/7/130740625/31019.pdf
    • http://gajusty.store/uploads/1/3/0/6/130604833/nevezababozuvevaxife.pdf
    • http://justinarndt.com/uploads/1/3/0/2/130272585/seroxidofatidadaku.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_off000066b6.bin
c6861a37f5ebffa30cab111992772b7a672db4f5984701a3423045e34fc441bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66B6 7416 bytes

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