Malicious PDF — malware analysis report

Static analysis result for SHA-256 337eb3980004cefb…

MALICIOUS

PDF

84.4 KB Created: 2021-03-07 18:34:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4d0276efb60e270f2f77af24c1e40880 SHA-1: e9a4e2c482de639c0dbede268b4ce192e97e3d99 SHA-256: 337eb3980004cefb0eeedb87b5d1d35fbc441864e4b3a8927de284d519f8e0bd
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs point to suspicious domains like 'baarspo.ru' and 'givurili.weebly.com', which are likely used to host malicious content or redirect users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/award?keyword=mtd+snowblower+not+starting PDF link annotation
    • https://givurili.weebly.com/uploads/1/3/4/6/134605008/b5497d9.pdfIn PDF document text
    • https://cdn.sqhk.co/fegokirar/Kidgdif/logo_quiz_answers_level_42.pdfIn PDF document text
    • https://kuzogirig.weebly.com/uploads/1/3/4/7/134748708/julatezipebuw-namotemurulakow-sowazof.pdfIn PDF document text
    • https://cdn.sqhk.co/xolizoxime/R1adBOx/wild_frontier_dog_food_can.pdfIn PDF document text
    • https://mesubepivugegej.weebly.com/uploads/1/3/2/6/132682347/c53161bdd09065f.pdfIn PDF document text
    • https://tetufimaburovi.weebly.com/uploads/1/3/4/0/134098130/foziwedi_jepupakilagimo.pdfIn PDF document text
    • https://cdn.sqhk.co/kawiwitifa/gdhgSgd/highway_bike_traffic_drive_suspended.pdfIn PDF document text
    • https://jewadasin.weebly.com/uploads/1/3/4/6/134604584/7417502.pdfIn PDF document text
    • https://lanasasaf.weebly.com/uploads/1/3/0/8/130815311/8474713.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408851/normal_601f83f501a2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478132/normal_6000b120f0af4.pdfIn PDF document text
    • https://xigizimevavas.weebly.com/uploads/1/3/5/9/135982966/5297849.pdfIn PDF document text
    • https://cdn.sqhk.co/rogudokives/xzVhhmX/jaxurovowo.pdfIn PDF document text
    • https://xupodidif.weebly.com/uploads/1/3/0/7/130739682/5319215.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/4ighc1J/24626188925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391624/normal_603f009a6fd90.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c252c8f-1d8f-4d6b-af97-f1063a862b6b/32493598168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/700fd728-cbbb-4ab6-9a2b-3dbc1deefab6/energizer_universal_nimh_battery_charger_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5817151-4e5f-4826-8c8f-b35a338a10f3/47325807598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a31a681-4c0a-4848-abde-8c0bcd6df2cd/hoover_steamvac_carpet_cleaner_directions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3068e30-0025-4b3a-8d61-2011a0d4e73c/lozurubokukejukabofemimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50298f27-b829-4129-95d5-ff5474b8cb36/samsung_hw-h550_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1918036e-2a55-4848-89ca-57813b1e7db7/what_to_write_in_your_godsons_first_birthday_card.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D46 5232 bytes
SHA-256: 3646c587261bcabef7ffaa22b8a504cc5c5707e02f522d05299a52d7c0cd7d4d
font_01_sfnt_off00011f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F38 10848 bytes
SHA-256: 22384868964c4fcdb297b0d07d49d6ba909e3b5f0438cb260523c0a43638274b