Malicious PDF — malware analysis report

Static analysis result for SHA-256 44973fc9327f32f3…

MALICIOUS

PDF

91.4 KB Created: 2021-03-23 13:51:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52f4a97f8829f5b0314e2d5d2dd33156 SHA-1: 2948a88cfd16d220b4ac857eb80745a5ebe50054 SHA-256: 44973fc9327f32f385fabe9a45a63e0c8d238193204e4b0567efe07bbac7bd72
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a 'PDF_SEO_LINK_FARM', indicating a large number of external links. One of these links, 'https://seumenha.ru/strik?utm_term=minn+kota+power+drive+v2+for+sale', is directly embedded and points to a suspicious domain. The presence of numerous external links suggests an attempt to manipulate search engine results or redirect users to malicious content. While no scripts were explicitly extracted, the nature of the link farm and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=minn+kota+power+drive+v2+for+sale
    • https://cdn.sqhk.co/tosilura/iiIRjcx/my_lips_are_sealed_song_in_movie.pdf
    • https://cdn.sqhk.co/porekige/Ophf1hc/dual_monitor_desktop_computer_best_buy.pdf
    • http://virona.org/17171825112nxse4.pdf
    • https://cdn.sqhk.co/wemowubire/HQhgcja/43554269781.pdf
    • https://cdn.sqhk.co/nilamemiw/djfWiif/28343046032.pdf
    • http://naturalm.space/how_much_protein_is_in_chick_fil_a_grilled_nuggets1hyek.pdf
    • https://cdn.sqhk.co/tezizejaropu/dVijnif/hey_baby_song_lyrics_english.pdf
    • https://cdn.sqhk.co/xujurovemu/jbV5DT4/nolimiwiru.pdf
    • https://cdn.sqhk.co/mazonixun/JvhdgcJ/31957492106.pdf
    • http://desokore.medianewsonline.com/harry_potter_and_the_deathly_hallows_game_free_download_for_windows_7.pdf
    • http://mamefumiwuto.mywebcommunity.org/55234046824.pdf
    • https://cdn.sqhk.co/dewozoju/bL9jgw5/werewolf_camera_apk.pdf
    • https://cdn.sqhk.co/mugolino/hdjegiR/zinalatajenukitisomuxi.pdf
    • http://peromopativej.mypressonline.com/89039897032.pdf
    • http://talajifit.mywebcommunity.org/xupojiduxemezoda.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cb0508fd-2a1f-4901-a161-a76823ee8e4f.filesusr.com/ugd/52013e_74d99b87e2d54f1fb783bd21f8c5450c.pdf?index=true
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_ba6bc1c21a114508a82bef495db9948a.pdf?index=true
    • https://s3.amazonaws.com/welanisowari/android_vs_ios_global_market_share_2018.pdf
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_60dd05fbb21b4a64a8594456382c7188.pdf?index=true
    • https://s3.amazonaws.com/xufaxoferugod/algebra_1_problems_worksheets.pdf
    • https://def26600-86c9-4442-a738-094ddf2992d1.filesusr.com/ugd/eb5a6a_5911d2e876744cbd87f1c931c61067b5.pdf?index=true
    • https://s3.amazonaws.com/zufaxepixiguxax/can_u_use_apple_airpods_with_android.pdf
    • https://s3.amazonaws.com/lorifawuvawot/suwuvirow.pdf
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_af452a67aeaf4272ab393780ad319343.pdf?index=true
    • https://s3.amazonaws.com/lusabifef/75196431801.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010aba.bin
b82fd85378686731c4a7a91ac2ebf8075b811f11b75723404d105b4416e6c76e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABA 5388 bytes
font_01_sfnt_off00011d4a.bin
961184d58971f03a50ed0532b9b458335e7beac84d2a21baa43bceb322b83639		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4A 12736 bytes
font_02_sfnt_off0001487f.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1487F 16204 bytes

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