Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d9f43f010c2fbe…

MALICIOUS

PDF

77.8 KB Created: 2021-03-23 23:16:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5a4e32c87f9ac10a4f462bc53eb47076 SHA-1: 0734f006f0cfe1199a9fe35e9c9af7bc2580fe98 SHA-256: f7d9f43f010c2fbe63b7a1b54b7e66d6b5682d21b9a3582572d8899619627e05
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO poisoning and phishing. Heuristics indicate a link farm hosted on disposable domains, suggesting an attempt to drive traffic to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/award?keyword=breath+of+fire+4+walkthrough+pdf+download PDF link annotation
    • http://pibadim.iblogger.org/no_man_is_an_island_thomas_merton_amazon.pdfIn PDF document text
    • https://jexiliwole.weebly.com/uploads/1/3/0/7/130739190/6fe04c2.pdfIn PDF document text
    • http://nokilupijavep.22web.org/1626739365.pdfIn PDF document text
    • https://sipitajopidegol.weebly.com/uploads/1/3/1/4/131453448/2441882.pdfIn PDF document text
    • https://luzidasagozoro.weebly.com/uploads/1/3/4/3/134319964/cfea3c268.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/a7d734d7-ccc3-430f-8039-6359aff49550/what_does_my_beauty_spot_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc19fb1e-3663-450a-aa73-13d2e69206d9/laboratory_manual_for_introductory_chemistry_concepts_and_critical_thinking_7th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be3ff0f0-ad11-4855-8e68-d9eb36f730fe/bubble_sheet_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71626f1e-d8c5-4f37-a14e-a56abdf0c339/cisco_dpc3825_docsis_3.0_data_gateway_firmware_update.pdfIn PDF document text
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_786ca8877c2146cea304a731f1c21fba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/effa9555-fa25-4c80-ae73-ff2f40f17985/punulilisagoluzig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b916a865-a16f-4073-8a60-d2234bc4d659/easy_acoustic_guitar_rock_songs_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f133ceb-9a86-43af-8d29-65e8b223899d/zonudakabuwawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f33667da-f7ee-4d27-8ef1-211aee85d7b0/72265797240.pdfIn PDF document text
    • https://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_5163e609b83349308c896bd677be9c80.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e795650e-1c0f-45c3-8209-43772ec82de0/how_to_make_phases_of_the_moon_fun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5268bad4-6e2f-4a20-a193-deb259edc70a/verizon_jetpack_activation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03a81f47-bc58-4009-983c-5dc186cb18a3/garmin_vivofit_3_battery_charge.pdfIn PDF document text
    • http://vetovolixexa.epizy.com/baal_veer_2018_sony_pal_video.pdfIn PDF document text
    • https://72858ab8-d36f-4bc2-b208-e5ec56e76d01.filesusr.com/ugd/3a4e0e_42dc57b06acf487d8a286829f0bc6fad.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8081019-9a71-4338-b1c3-c773c32c7f08/what_caused_great_depression_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02e37380-5e49-4639-ac0a-afde9c516945/lurulebukaluladefaxejonu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c12d8d-7e82-47dd-9ee4-16d1362a744b/hp_500_designjet_printer_price_south_africa.pdfIn PDF document text
    • http://zodipez.rf.gd/stack_on_10_gun_safe_for_sale.pdfIn PDF document text
    • http://wexugemo.epizy.com/tolupefukepu.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_off0000f375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF375 5416 bytes
SHA-256: f28116b75366fef021191e48cae20d1b2f749699920751da0c9a10f0e1bd039f
font_01_sfnt_off000105fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FC 10320 bytes
SHA-256: cdf7acc04edebfee9f06f8d498c4d95fae2b14a2ae0cf09eeb8b0ff15bf9bdea