Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b72173926886f46…

MALICIOUS

PDF

93.6 KB Created: 2021-03-16 02:23:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 264757ba42356964b210d0ece9ff6f28 SHA-1: b0270532cb4268f5d4fa069c61fc45bf79dee587 SHA-256: 7b72173926886f4681ff005d2313816dc88d6b800bdcde86d3de33a3aa2794fb
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing campaign. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://ponafet.ru/strik?utm_term=innova+3100j+diagnostic+tool
    • https://cdn.sqhk.co/navimoxa/hgiic7h/clash_of_clans_unlimited_troops_hack_android.pdf
    • http://prizinsta.site/english_grammar_exercises_prepositions_with_answersl07aj.pdf
    • http://dress-russia.ru/australian_haemophilia_guidelinesmqgg4.pdf
    • http://ompala.store/coraline_book_hardbackxg4sg.pdf
    • https://kulojimafad.weebly.com/uploads/1/3/4/5/134518235/gowazewu.pdf
    • https://cdn.sqhk.co/solalokazili/7Qljchi/world_war_ii_history_round_table.pdf
    • https://vigodabazo.weebly.com/uploads/1/3/4/8/134872933/596653.pdf
    • https://cdn.sqhk.co/widiroje/jhEiahc/wolowitz_mom_actress.pdf
    • https://sokirokesavosa.weebly.com/uploads/1/3/4/9/134901907/jetebegumew.pdf
    • https://vepodiruwa.weebly.com/uploads/1/3/4/3/134374194/negafozava_zakefarejotenu_jovilopem.pdf
    • http://cocobuka3.xyz/141864965400svae.pdf
    • http://nubilofanekib.mygamesonline.org/81354812199.pdf
    • http://eglo.club/information_of_dendritic_drainage_patternijblx.pdf
    • https://cdn.sqhk.co/tufuboloruj/jdLgZha/jisibovo.pdf
    • http://graatorama.fun/the_tibetan_book_of_living_and_dying_audiobook_downloadjgiaz.pdf
    • http://just-gopro.com/saluwotez43zg8.pdf
    • https://cdn.sqhk.co/risenulowo/iVjdCEv/revolico_la_habana_junio_2020.pdf
    • https://mabatuba.weebly.com/uploads/1/3/5/3/135303696/85eda0a.pdf
    • https://cdn.sqhk.co/jorubili/gqhajew/hoperf_rfm22b_datasheet.pdf
    • http://dupuladusudired.mypressonline.com/learn_english_grammar_through_tamil_download.pdf
    • https://cdn.sqhk.co/javeduner/hFphejf/82888691009.pdf
    • https://cdn.sqhk.co/gabadifofibo/O8hcigh/28805169785.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://jamenajiko.myartsonline.com/45421819389.pdf
    • http://baxewape.myartsonline.com/47238951898.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000121e6.bin
5873134d89f824265c517e27da225fa32e0dbbe4154066206aaf877698bd280b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121E6 5112 bytes
font_01_sfnt_off0001335f.bin
d5843462636173fb472fd6197820960afcac4e90d35b3e4e2aa5a7c44d49dfa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1335F 11540 bytes
font_02_sfnt_off00015a98.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15A98 4324 bytes

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