Malicious PDF — malware analysis report

Static analysis result for SHA-256 189476d1e6228a32…

MALICIOUS

PDF

35.5 KB Created: 2020-05-01 04:26:52 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 78c9dbf196bd688ca51141b6576b3690 SHA-1: 23e86ac7e21c8edea1a21e1324b6792681c1c5ce SHA-256: 189476d1e6228a3237fc4b53228cc962de0c4af2ac8ef9c9bce5a965008cb976
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO spam campaign. The embedded URLs point to various domains, all structured similarly, indicating a coordinated effort to redirect users. No scripts were extracted, but the sheer volume of links and the ML classifier's high confidence score point to malicious intent.

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://ebmccallanbuildingltd.com/uploads/1/3/0/5/130551179/130551179.html#islamic+border+vector+free
    • http://esportsarcademy.com/uploads/1/3/0/2/130289278/wujevebawajud.pdf
    • http://noheaskitchen.com/uploads/1/3/0/5/130588847/fuvutinobimimexogu.pdf
    • http://sycon-metal.com/uploads/1/3/1/3/131384300/regejewudupisowuxaz.pdf
    • http://tugenetica.es/uploads/1/3/0/8/130874286/pitegureni.pdf
    • http://bostonmakereducators.org/uploads/1/3/0/5/130541744/8233965.pdf
    • http://travel-cohort.com/uploads/1/3/1/6/131606133/sokewugepoli.pdf
    • http://suzifarms.com/uploads/1/3/1/1/131163838/sevunok.pdf
    • http://thecharme.shop/uploads/1/3/0/5/130551729/2417111.pdf
    • http://dairycareaction.org/uploads/1/3/1/4/131453541/xegobojamasija.pdf
    • http://thepeoplespantry.org/uploads/1/3/0/2/130287289/3812938.pdf
    • http://cybergovernance.us/uploads/1/3/0/2/130289703/3280736.pdf
    • http://anthonyacevedobook.com/uploads/1/3/0/6/130604892/getemugora.pdf
    • http://tropicrenov.com/uploads/1/3/0/8/130814101/330ee69fd0c3413.pdf
    • http://cookinglivinggiving.com/uploads/1/3/1/0/131069921/c3ced4e68.pdf
    • http://16chauncystreet.com/uploads/1/3/0/6/130640051/wupokiwadavega.pdf
    • http://americanlandscapingservice.com/uploads/1/3/0/5/130539102/mageragofikir.pdf
    • http://thegivingfoundation.org/uploads/1/3/0/7/130775870/8fb8b8e.pdf
    • http://omnicasa.org/uploads/1/3/0/7/130739811/sekulunigi-mejemorasexadon-buzomope.pdf
    • http://tflowmusicgroup.com/uploads/1/3/0/6/130621998/jovulajisisozukuxito.pdf
    • http://luxechicagolimo.com/uploads/1/3/0/5/130590474/butax-rufezofusuduxom-tuvofabifilet-baguv.pdf
    • http://wmochrist.org/uploads/1/3/0/2/130274169/xakozekegixiforisaxo.pdf
    • http://girlthingshopping.com/uploads/1/3/1/4/131438423/luwusufa_sazuda_defuwirejewe.pdf
    • http://searlo.com/uploads/1/3/0/3/130323750/47af0aec435ac.pdf
    • http://oregonbca.com/uploads/1/3/0/6/130639052/3734924.pdf
    • http://imagineprojectmusic.org/uploads/1/3/0/5/130590241/5299513.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e13.bin
3842710aefe4fcab212990f9c1b5e65585cdf6ec75e3b12231b6bd3241fd9e11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E13 6576 bytes
font_01_sfnt_off0000784c.bin
83459e82cebe561b9e65dda6a09953c9e35f75e5df0fa62a624e1833cc5b8086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x784C 1708 bytes

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