Malicious PDF — malware analysis report

Static analysis result for SHA-256 9757960f58e30738…

MALICIOUS

PDF

41.1 KB Created: 2020-03-12 05:41:35 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 7ab35cad93ecfba2a87cb03f77c23ef4 SHA-1: f5eb60456141a08031cbe7edaa42f99b4a688433 SHA-256: 9757960f58e30738f1c2d6f43c3e6b5a75468adfdac94ded281dcd5e25f5c660
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO spam tactic. The document body, though partially corrupted, contains references to 'Mbbs first year anatomy book pdf' and 'wkhtmltopdf', indicating a lure to disguise the malicious intent. The primary heuristic identified a link farm structure with 30 external PDF links, pointing to various domains. The embedded URLs are likely part of this scheme to redirect users to 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://ttmusb.com/uploads/1/3/0/2/130289371/130289371.html#mbbs+first+year+anatomy+book+pdf PDF link annotation
    • http://www.trishasxtremeclean.net/uploads/1/3/0/3/130379590/bitituxibovo_nirofalobana_vujofilizozojop.pdfIn PDF document text
    • http://elomla.com/uploads/1/3/0/7/130775046/gorebilurekijul_vameloxibow.pdfIn PDF document text
    • http://cfstephenville.com/uploads/1/3/0/7/130776561/b22ecf2.pdfIn PDF document text
    • http://northcountypawscause.org/uploads/1/3/0/7/130738779/wololuva_gutisovubi_bijep_loparogog.pdfIn PDF document text
    • http://aromapizazz.com/uploads/1/3/0/2/130270889/d601772457d512.pdfIn PDF document text
    • http://vousetnousen2020.com/uploads/1/3/0/7/130740260/vesiji.pdfIn PDF document text
    • http://bohemianethicalstore.ca/uploads/1/3/0/5/130543877/luguliwerazokikowa.pdfIn PDF document text
    • http://tistshop.com/uploads/1/3/0/8/130815311/bafdf.pdfIn PDF document text
    • http://mytaj-prembenefits.com/uploads/1/3/0/3/130379902/6208728.pdfIn PDF document text
    • http://lindseymarina.com/uploads/1/3/0/8/130873976/wivafu_desexusider_zaxufegeno_somodevajapapek.pdfIn PDF document text
    • http://2handsstudio.net/uploads/1/3/0/3/130323355/b12ffa5bddb.pdfIn PDF document text
    • http://snackopedia.com/uploads/1/3/0/8/130813401/vuxatiwilowonak_puniburivefokis.pdfIn PDF document text
    • http://bguided.org/uploads/1/3/0/7/130775626/putatodebeza.pdfIn PDF document text
    • http://larashennib.com/uploads/1/3/0/4/130489367/wiruv-lawevefer.pdfIn PDF document text
    • http://konocticars.com/uploads/1/3/0/6/130639051/2f4dccbb4f.pdfIn PDF document text
    • http://everybodycomestoricks.com/uploads/1/3/0/7/130776898/pibexizibo.pdfIn PDF document text
    • http://katiesopocidrake.com/uploads/1/3/0/6/130605015/7a3c27e7aa.pdfIn PDF document text
    • http://bjornsbounty.com/uploads/1/3/0/5/130543156/b4a816800.pdfIn PDF document text
    • http://plancul-reims.net/uploads/1/3/0/6/130605217/wurelizetiduja.pdfIn PDF document text
    • http://organizationbeyondtheshoebox.services/uploads/1/3/0/7/130738680/vurepufi_givebiwapub_vaporamojukija.pdfIn PDF document text
    • http://clipture.net/uploads/1/3/0/6/130620327/somasababelekasope.pdfIn PDF document text
    • http://www.juliannerealtor.com/uploads/1/3/0/2/130291624/mopilebasajigum.pdfIn PDF document text
    • http://baronwheelweights.com/uploads/1/3/0/6/130622103/b0342a8ba9d6.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7702 8132 bytes
SHA-256: 82c76bf7f2483caf58a0ef990e02e89eb438f46e0c884a67d5bc68c1115dfcf8

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