Malicious PDF — malware analysis report

Static analysis result for SHA-256 70c9b7dc56941863…

MALICIOUS

PDF

84.1 KB Created: 2021-03-09 13:57:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb1169c06e58568143adfac292b4b767 SHA-1: d00570b13f843554cbde5601daafe553efed1a7f SHA-256: 70c9b7dc56941863c71047e5d3997f95ae6e0a8f295eaf952a658b2879fa057e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' indicating a large number of links. The primary external URL, 'https://jumiwimov.ru/123?utm_term=canada+food+guide+chart+2018', suggests a lure related to the Canada food guide. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://jumiwimov.ru/123?utm_term=canada+food+guide+chart+2018
    • https://kipejuxi.weebly.com/uploads/1/3/2/6/132682137/b6ad20c06a9dea.pdf
    • https://jowetetezuvam.weebly.com/uploads/1/3/4/7/134717416/63699.pdf
    • https://rogefuza.weebly.com/uploads/1/3/4/6/134688393/kababi.pdf
    • https://gavofazipog.weebly.com/uploads/1/3/3/9/133999173/c81cca7fcb1.pdf
    • https://gusizamavuva.weebly.com/uploads/1/3/4/6/134629738/d901ed37.pdf
    • https://sefomaxezaniv.weebly.com/uploads/1/3/1/4/131483109/newogelit-xufow-bexubuwesi-zarerixizozuk.pdf
    • https://ronikirene.weebly.com/uploads/1/3/5/3/135393313/748171.pdf
    • http://ginupedarokuxu.getenjoyment.net/oracle_12c_end_of_life_extended_support.pdf
    • http://xepidenad.scienceontheweb.net/38655538475.pdf
    • https://debovibeki.weebly.com/uploads/1/3/4/7/134715081/wilirizafar.pdf
    • https://tofejigijo.weebly.com/uploads/1/3/4/3/134312142/9188543.pdf
    • https://jasitonil.weebly.com/uploads/1/3/4/0/134096785/nosexafon_mepuniwozekizuf_bezinepisizoku.pdf
    • http://bexixibeguben.sportsontheweb.net/amy_tan_mother_tongue_critical_analysis.pdf
    • http://bekopomulasebi.getenjoyment.net/how_to_steam_vegetables_with_a_steamer_basket.pdf
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/sirofuduwolopa_fubewesoke.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/1d03bfa0-d3b7-4875-82ee-e39e6949d4f4/sakimetuzopageduwejes.pdf
    • https://uploads.strikinglycdn.com/files/01b4667e-bbe1-46ae-8c6c-c33e4a14d59f/quimica_organica_definicion_e_importancia.pdf
    • https://uploads.strikinglycdn.com/files/bc81992e-ac0a-44f7-8c2d-5bfa58bb3c0f/zorosirek.pdf
    • https://uploads.strikinglycdn.com/files/31438082-7f9a-42d3-acbb-210eef9a6db7/jajufodujo.pdf
    • https://uploads.strikinglycdn.com/files/d050b9da-bb24-4b3c-9c07-cfffe3e22be6/dragon_age_origins_awakening_best_rogue_specializations.pdf
    • https://uploads.strikinglycdn.com/files/dde3978b-aab9-4d79-9557-c9deaeaf1785/age_limit_for_car_seat_in_texas.pdf
    • https://uploads.strikinglycdn.com/files/ec24b029-8d07-4c14-93d0-c8567b7be0fe/gogetuti.pdf
    • http://tebaputazaxuva.myartsonline.com/what_does_safety_dance_mean.pdf
    • https://uploads.strikinglycdn.com/files/e760c206-63a1-4b9a-ae15-e61342876abf/68689179816.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe51.bin
24598aa5bd9ea434a1982e43bb73cf8977c3400530ba2e1844ec209d2eb65738		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE51 5500 bytes
font_01_sfnt_off00011104.bin
2e98f96b8c121184a2d7e0700bd40a38de8b9566c416c51fd75afa7348ce780e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11104 10648 bytes
font_02_sfnt_off00013507.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13507 4324 bytes

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