Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dc0742fed08c7b8…

MALICIOUS

PDF

106.7 KB Created: 2021-03-13 14:15:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: a64a38242d7d0d02a74df5e2b4f65f47 SHA-1: b5de150fd77eecf8612a15235414cd9a6f5b7690 SHA-256: 9dc0742fed08c7b83a571b5fd0d0b0b42e9ec4780176d001ba6da4276d2674ad
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. One of the primary URLs extracted is https://jumiwimov.ru/wix?keyword=harvest+moon+awl+crops+guide, which is likely the intended destination for the user. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jumiwimov.ru/wix?keyword=harvest+moon+awl+crops+guide PDF link annotation
    • https://mupezoki.weebly.com/uploads/1/3/0/7/130739180/simokevobito_tijoraku_kijope.pdfIn PDF document text
    • https://nugilura.weebly.com/uploads/1/3/5/3/135317706/0c321f.pdfIn PDF document text
    • https://cdn.sqhk.co/perikowep/hhhdeha/classic_car_city_racing_3d_model.pdfIn PDF document text
    • https://tobivuzulukimu.weebly.com/uploads/1/3/1/3/131384599/1db589fffb15f92.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/aAgiiie/83161417474.pdfIn PDF document text
    • https://cdn.sqhk.co/butituguxur/c4WrJQL/misomuduwakej.pdfIn PDF document text
    • https://kujafuzepod.weebly.com/uploads/1/3/1/6/131637430/9150093.pdfIn PDF document text
    • https://bajurajatug.weebly.com/uploads/1/3/6/0/136054821/xoputakatumumu.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/jeYghgf/sezazix.pdfIn PDF document text
    • https://fusarutuzazeni.weebly.com/uploads/1/3/5/3/135346017/zukov.pdfIn PDF document text
    • https://vuvunovugigadi.weebly.com/uploads/1/3/0/8/130814714/8887581.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/3037d980-a7d1-4bc6-b33f-8d1dbcee5257/metal_gear_solid_2_substance_ps2_unboxing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c22fe9f8-b12d-4c3a-81b7-8100eb6d4723/what_kind_of_oil_does_a_honda_accord_take.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a992b3f-bd75-4617-8f09-dc5a52051cef/77077383105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd3f70de-c041-4771-b774-e7779481898b/nivesoxojixofirufavixum.pdfIn PDF document text
    • http://botawaxugeb.epizy.com/racing_car_new_game.pdfIn PDF document text
    • http://timavutiziv.epizy.com/82849530317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e75e11f1-12ca-4626-93b6-983716a30ba4/wojadelapagavitobij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a153352c-609c-457d-b977-a55cd4038484/32401877701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1a8ebb5-79f9-401f-b061-3566d7c51a91/24678859654.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3576be5-b2eb-46b5-b125-4f32b278ddaf/42773024399.pdfIn PDF document text
    • http://tutanimonuwodam.epizy.com/big_bus_miami_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fd8bd8f-d162-4185-b381-97a806df9e12/where_is_the_thermostat_located_in_a_2006_chevy_equinox.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_off0001655f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1655F 5504 bytes
SHA-256: df58e4647b68279e5c84e0f1e5d0746271677ed375deda4639defa4efb91cae6
font_01_sfnt_off00017815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17815 10988 bytes
SHA-256: 706c352f8eacc99c77906a660145d2ca8a5ceab88b1fcc27cd37ef79e0f7b2f0