Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c4275539367e796…

MALICIOUS

PDF

74.9 KB Created: 2021-03-12 20:18:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddcf28229c9ca4ab6474486d2342abc7 SHA-1: 95f34c0e0523e141cdc53d831765685560b4600c SHA-256: 2c4275539367e796a0848c28e574709d12e0597d9602b10f105094b724670382
134 Risk Score

Malware Insights

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

The PDF document is detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting itself as a 'John Deere 70 lawn tractors parts manual' to deceive users into clicking on external URIs. The presence of numerous links on disposable hosting, coupled with UTM parameters, suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nipisod.ru/strik?utm_term=john+deere+70+lawn+tractors+parts+manual
    • http://begimux.iblogger.org/zakapisekut.pdf
    • http://baykamif.space/69099107522pt477.pdf
    • http://dutewokoke.22web.org/98724760233.pdf
    • http://zexawof.22web.org/lexoketezugisinozib.pdf
    • http://xumosigebazu.iblogger.org/24675982843.pdf
    • http://nokewobepasag.22web.org/attack_on_titan_season_2_anime_planet.pdf
    • http://winoraama.website/block_strike_hack_apk_androidp2k42.pdf
    • http://ledabojuvogo.22web.org/activator_microsoft_office_professional_plus_2010.pdf
    • http://crawlmqyu.space/is_loreal_feria_bad_for_your_hairxplsq.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://munugarufidapob.rf.gd/40453893981.pdf
    • http://robowogutalopet.epizy.com/g_s_letter_wallpaper.pdf
    • http://boxemoje.epizy.com/what_is_a_stock_solution_in_chemistry.pdf
    • https://uploads.strikinglycdn.com/files/fe3a376d-9024-4b41-8059-100468662074/liguxefuvaxegi.pdf
    • https://uploads.strikinglycdn.com/files/b4524a47-6285-4828-aa62-41e72e97ac54/how_to_remove_demi_permanent_hair_dye_in_one_day.pdf
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_dab825f7ef6144bea8a7abe025e3abc8.pdf?index=true
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_9f498df78b18457d9307eb7e25b44238.pdf?index=true
    • http://wofebedemus.rf.gd/premier_protein_shake_recipes_vanilla.pdf
    • https://ac65beef-1c88-4b01-a948-251493ed82f2.filesusr.com/ugd/09857b_6c5e0a33ebcf4a2b85c2083dc2092a94.pdf?index=true
    • http://zinikifog.rf.gd/nexijujoxo.pdf
    • http://joxowosikaze.rf.gd/balls_game_mobile.pdf
    • https://uploads.strikinglycdn.com/files/cb8b50f1-2265-4220-9006-788726c8ee30/zesavabivawadusevided.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_off0000e4d9.bin
0222144edda5a6b4591e05d2b5e4e1a4a46fd8d869ad2c19a38ac8c241aa6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D9 5616 bytes
font_01_sfnt_off0000f7de.bin
b3ac58515d017d2b3a24e1f3b3a17d7ed5b61b21f8e553cbeb00248711e525eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DE 11272 bytes

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