Malicious PDF — malware analysis report

Static analysis result for SHA-256 947a04790cd526fa…

MALICIOUS

PDF

73.7 KB Created: 2021-03-21 10:59:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e7aec9406e6cbce6b95f7b48bf3cdf5 SHA-1: ee271513d6e93d0e750d64667317aff3616b5b4b SHA-256: 947a04790cd526fa27450dcad4d366c1c8c20699d6515370396fc7a17d7323ac
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to a suspicious domain ('dafemum.ru') that is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://dafemum.ru/strik?utm_term=how+many+calories+in+taco+bell+seven+layer+burrito
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5fd7c412b902b.pdf
    • https://static.s123-cdn-static.com/uploads/4473637/normal_5fcaa0bb3224e.pdf
    • http://lamiwefawiwa.iblogger.org/add_first_edition_players_handbook.pdf
    • https://static.s123-cdn-static.com/uploads/4452154/normal_5fec23e8cfe57.pdf
    • http://levupag.22web.org/fuvuvigobogokul.pdf
    • https://cdn-cms.f-static.net/uploads/4470832/normal_5fe7cf81cd8ee.pdf
    • https://cdn-cms.f-static.net/uploads/4387408/normal_5fea1b5db88dd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://89d37d93-eaf9-4fc7-8d5e-07438b8f18e7.filesusr.com/ugd/e80f4c_85bd5b16f79645b785cf737b72df507c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/95b2f716-a536-4589-8fb7-027c2962825f/lururafujolabifosexadeb.pdf
    • https://184d393c-d2ff-49e5-bbcb-48626b1dbf88.filesusr.com/ugd/49be48_106d052410b8499a9f946d5293ef6119.pdf?index=true
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_db650114faed4172b9bc35f6345d3480.pdf?index=true
    • https://1b3fde16-7575-45ba-b40e-8916c64185ca.filesusr.com/ugd/8874e8_ad38a55e4597470d9380bd2a73e98eb5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5ce247c0-a6ef-4924-ab4d-4e8b507d9559/76285590997.pdf
    • https://e5720c39-3c1c-4a52-9be9-509675281b5a.filesusr.com/ugd/0010c8_b516fdc24e8e454396b7224add75f186.pdf?index=true
    • http://vodulisus.rf.gd/mozigutawiroxatodomo.pdf
    • https://b7b9a0d4-d71d-433a-9dbc-8293b1c729aa.filesusr.com/ugd/979434_4ef5a0e0aff04cd48ee4f4b567074ae3.pdf?index=true
    • http://famifel.rf.gd/wukulojudesat.pdf
    • https://uploads.strikinglycdn.com/files/e3921cd6-643a-4536-9c7d-9592fb74c4f0/how_to_make_an_ebook_and_sell_it_on_amazon.pdf
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_b2f650722fbf4d648998c78edcc6a0b2.pdf?index=true
    • https://dd39d194-9042-494f-90ab-223c96cf8da5.filesusr.com/ugd/5d3909_b3286763b1474113aa38ca749b0932a1.pdf?index=true
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_5174374839104c1a9741de9013c5e54a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/807146af-16f3-49a3-91e0-7e4c3ef7b315/99568681781.pdf
    • https://uploads.strikinglycdn.com/files/e3571bf8-6061-4af1-a710-ee2cf1ce2d36/kuvotene.pdf
    • https://uploads.strikinglycdn.com/files/ad472ce6-a337-4b08-a870-5c3337e68bcb/75809173308.pdf
    • https://uploads.strikinglycdn.com/files/26a4d54a-5906-4364-af07-3fd8f3007003/werifujixolid.pdf
    • http://pijopatamotawu.epizy.com/fudunajimakuno.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e12b.bin
ccabf21b5fbd52d1670fc9a07eb645b8619b6f8cb4d26309b1a74d148bbbd691		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE12B 5300 bytes
font_01_sfnt_off0000f331.bin
6d55cadde484f02b6f5f61e9fb60631ffc2f139daf2bab8a53e4d5ccc8dae6d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF331 11028 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.