Malicious PDF — malware analysis report

Static analysis result for SHA-256 2137201c083a33de…

MALICIOUS

PDF

41.0 KB Created: 2020-03-15 15:53:14 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 304cbe1cafa4fa924bb269c20ebeca74 SHA-1: 3d5b16c0f15904bd3dccffaec3e77a1612699ad9 SHA-256: 2137201c083a33de3e7f7b14a743be0780d7a67832664379473e085432f8b881
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains a large number of embedded links to external websites, characteristic of a link farm or SEO spam campaign. The document body, though partially corrupted, indicates a lure related to an 'honorable mention certificate template'. The primary goal appears to be directing users to these numerous external PDF files hosted on various domains, likely for malicious redirection or content delivery. No scripts were extracted, and the document structure itself is the primary vector for the attack.

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://mta-sts.mx.sexoffendercontainment.com/uploads/1/3/0/6/130605516/130605516.html#honorable+mention+certificate+template
    • http://audit-west.com/uploads/1/3/0/2/130289800/bitani_kiwowitiwa_sagotabol_kavemowadov.pdf
    • http://bigcreekgreenway.org/uploads/1/3/0/7/130775592/bekupumi.pdf
    • http://anitadrummond-lpc.com/uploads/1/3/0/2/130270971/bajinubule-vazakevatedez.pdf
    • http://canis-salubris.com/uploads/1/3/0/5/130588960/wuzen-vanarepakima-zotivot.pdf
    • http://fiftymoretogo.com/uploads/1/3/0/5/130551190/e4376c.pdf
    • http://www.365tradingacademy.co.uk/uploads/1/3/0/8/130813663/wumirodofazaxit.pdf
    • http://ontariocaairporthotel.com/uploads/1/3/0/2/130287502/nowefixanumaligazif.pdf
    • http://e4thavecoc.com/uploads/1/3/0/8/130814120/9928896.pdf
    • http://myoppconsulting.com/uploads/1/3/0/6/130621412/rapimafoliguki.pdf
    • http://proanasel.com/uploads/1/3/0/4/130483286/4566427.pdf
    • http://christinagdennehy.com/uploads/1/3/0/7/130738913/rivijavelisejomib.pdf
    • http://mdprostart.com/uploads/1/3/0/6/130639491/begugarofu.pdf
    • http://myfatlab.com/uploads/1/3/0/8/130814788/posisotolo.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_off00007777.bin
c0b0a5aa851db374b44f57175a338fc8e38c76feecaf6fc836501dfb96c9bc2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7777 8340 bytes

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