Malicious PDF — malware analysis report

Static analysis result for SHA-256 93add62fb2bc7339…

MALICIOUS

PDF

80.1 KB Created: 2021-05-29 13:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 78875d748b6b6d1a92aedfcc52e7e1a5 SHA-1: 17ff762640ca543f934a4d8daac858b1814dd3e1 SHA-256: 93add62fb2bc73390565c6548b25d4422928deeb0376ec70e731b1e2b08fedb5
206 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://dugedepap.ru/strik?utm_term=authorized+representative+form+mc+382 PDF link annotation
    • https://kelawuduj.weebly.com/uploads/1/3/4/3/134330896/b8abd12bf41261d.pdfIn PDF document text
    • https://fosaxobe.weebly.com/uploads/1/3/4/8/134882536/sonomubijud-jitonalisuda.pdfIn PDF document text
    • https://vukasusig.weebly.com/uploads/1/3/4/3/134349680/lutevakasiwugiruma.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388612/normal_5fc6f125616c7.pdfIn PDF document text
    • https://tawuvumiru.weebly.com/uploads/1/3/5/3/135326103/muvare_kanaruzil_gojakivelefu_nutofukofomo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407086/normal_606008fe784e0.pdfIn PDF document text
    • https://jodulimije.weebly.com/uploads/1/3/4/7/134732884/0e5d36a40a3.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/b42f821b-04db-484e-ab50-5bcd63246cab/48658426482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b67dcc1-7121-437e-a434-d50ff71dee31/kujorita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fe4c59f-2158-433c-ab5c-e604b7125523/how_to_clear_bluetooth_memory_pioneer_avh-p4400bh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58d7a35e-e993-48d3-b4fc-bf0cb1a3ad7b/which_is_better_coleman_or_intex_hot_tub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfebe26b-ab4b-4640-89bc-859e1511cf1b/reloj_timex_expedition_indiglo_wr50m_precio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dab5582-2142-4697-915b-482fef364d51/can_the_battery_be_replaced_in_a_kindle_fire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/503c362d-a859-428b-bb2b-99f4222fd06a/what_is_the_main_difference_between_agglutination_and_precipitation_reactions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cd9715b-feb1-4b04-8172-e2cb637d8a76/my_feudal_lord_in_urdu_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/741567e5-dab4-46cf-9129-d6d9f73fa737/61817116136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d9c8fc5-803a-4c5d-ba4a-f58777483dd8/ziwejukokowikazupumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/035652da-9d0d-4cbe-bf66-966cca2cfc09/pride_celebrity_x_mobility_scooter_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6751b8ee-f0ff-4d9d-9d78-6cd1e5df04b1/wubovom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1535932f-4af1-4645-8f87-efd70fa8bcc9/jesamulikulelivesubidix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4ae4648-4a92-4cc4-9981-044e01764f41/apple_ipod_shuffle_2gb_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e0e40d9-e5a5-4896-8c39-362224ebb099/somakonudofinexajoganege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/520fde11-6254-4157-be43-a87a94c1a5fb/mopukebodovimameza.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_off0000f6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B1 5952 bytes
SHA-256: 9c062df41a8ae0058f5743319c1b16c2ebc054ecca56ee67b3a7bebb87b9cd00
font_01_sfnt_off00010adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADB 11216 bytes
SHA-256: fe5de30a7cfb6afcbadffa4bc3c4e114c9925e1f180acdc5d17ef8c0f43da2f8