Malicious PDF — malware analysis report

Static analysis result for SHA-256 c92d610682dc4591…

MALICIOUS

PDF

83.9 KB Created: 2021-03-11 19:29:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e310c6425eb95e5da6dde8b093ede432 SHA-1: d18dd1688ba4f0bbfd7df901ba20d241135aa11b SHA-256: c92d610682dc4591b51b86872ee9f2d69b07e4f5cd1fc874ec63477f00ed1b4e
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as relevant content, indicating a link farm or SEO spam operation. The primary external URI points to a URL that appears to be part of this scheme. While no scripts were explicitly extracted, the PDF structure and extensive linking suggest an attempt to drive traffic to malicious or deceptive websites, potentially as a precursor to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • 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.
  • 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://botokaw.ru/wix?keyword=introducing+body+language+a+practical+guide+pdf
    • https://livuwijonirib.weebly.com/uploads/1/3/4/7/134732661/68e6f.pdf
    • http://gelumagiz.iblogger.org/bowoxapokogigisovid.pdf
    • https://rivagusej.weebly.com/uploads/1/3/4/2/134266472/zinolowinivoz-zenowiromofo-zuzunobaze.pdf
    • http://tomobufefiz.iblogger.org/ginurijaxurirozoridekewu.pdf
    • https://komamopiragi.weebly.com/uploads/1/3/4/4/134444029/a54f6e836d9.pdf
    • https://tebukebodo.weebly.com/uploads/1/3/1/3/131381901/liduw-sabosu-zunezoza-pogobozibetomu.pdf
    • https://cdn.sqhk.co/duponetix/ifjbhcs/motorcycles_for_sale_by_owner_craigslist_oklahoma.pdf
    • https://biligimanud.weebly.com/uploads/1/3/1/4/131454089/1d17d454986c1.pdf
    • https://cdn.sqhk.co/pizokifuxe/gdidEjd/fovuz.pdf
    • https://bateworolod.weebly.com/uploads/1/3/4/3/134315912/zeloze-jimenaresoj-xamikometij-jurigawebij.pdf
    • https://cdn.sqhk.co/fofodafexadu/iicjbDW/knife_blades._io_crazy_games.pdf
    • http://gonisavuxur.iblogger.org/the_time_travelers_wife_movie_explained.pdf
    • https://cdn.sqhk.co/nomitusibop/geghE3B/33516976418.pdf
    • https://kegewibenufugix.weebly.com/uploads/1/3/2/6/132682471/9187068.pdf
    • https://napifilimikap.weebly.com/uploads/1/3/1/6/131606974/1532842.pdf
    • https://papokekes.weebly.com/uploads/1/3/4/5/134599002/gisij-gumuwavapegero-palikaxina.pdf
    • https://dejatenuti.weebly.com/uploads/1/3/5/3/135348415/sewine.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://16e729f2-8c5c-4787-b670-14aeba6c5e03.filesusr.com/ugd/ac55e2_5f170d4d5bb24d8c8ffc46065822df81.pdf?index=true
    • http://xuboxigaxa.rf.gd/craftsman_tiller_parts_gas_tank.pdf
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_9ecd0166b1e74cc3832c4d430729fa00.pdf?index=true
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_a4eab0eb5f8e419c896024e65948b90a.pdf?index=true
    • https://0cc2a7d0-6f33-4335-9ec9-554d9418487e.filesusr.com/ugd/cb4a18_1478f8fb0e38477caa99fd7fc9eeaebe.pdf?index=true
    • https://ad177677-9664-42cd-9bf2-17a10eef6e1d.filesusr.com/ugd/f8915e_e2699213ff234591aab14c434ec93d4c.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb6f.bin
f84246aab9778c4761406e392fd9873ea3e199ff4d09147282607da7ac827092		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6F 5204 bytes
font_01_sfnt_off00010d35.bin
9e21313640ac1247e78ee9126b5509ed618602e6347f6f327373bc2e7a49f1fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D35 11260 bytes
font_02_sfnt_off000133a0.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133A0 4324 bytes

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