Malicious PDF — malware analysis report

Static analysis result for SHA-256 059e26dca32f12a8…

MALICIOUS

PDF

78.3 KB Created: 2021-03-07 00:57:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 04847edf6833fd75530c0f5d62b60a1f SHA-1: 3c0dfe5c9e6dded141209f93a348ed86da911231 SHA-256: 059e26dca32f12a814e4e7a5496da4bbe08a028aa529af6bec05b940831742f2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan. It contains numerous embedded URLs, with a primary one redirecting to a keyword-based search result page, likely a lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a large number of links on disposable hosting, further supporting a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • 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://gimoguvi.ru/wb?keyword=top%20law%20firms%20in%20new%20jersey PDF link annotation
    • http://itsnat.space/7617942037r30kg.pdfIn PDF document text
    • http://eduha.online/alter_ego_level_1_exercise_bookcuywj.pdfIn PDF document text
    • http://puvepum.getenjoyment.net/68206285959.pdfIn PDF document text
    • http://gufutaca6.xyz/641368082937uuy6.pdfIn PDF document text
    • http://socialwave.me/tabla_de_distribucion_normal_estandar_hasta_6dpvge.pdfIn PDF document text
    • http://my-favshopc.online/172236047877mqoa.pdfIn PDF document text
    • http://my-credit.info/crossed_aldol_reaction_mechanismmskuw.pdfIn PDF document text
    • http://tarezirok.mypressonline.com/kjv_bible_with_strongs_concordance_numbers.pdfIn PDF document text
    • http://bloomwithdeanna.com/29712990192zeoft.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418566/normal_5fc71fb6dc702.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465907/normal_5fec42f4a3d0f.pdfIn PDF document text
    • http://euromarket.pro/sedodovosisoxarorujibobunwk3t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492892/normal_5fe3f0151e505.pdfIn PDF document text
    • http://trujillostacoshop.com/cosco_car_seat_base_installationo2bbi.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/is_there_a_live_chat_for_facebook_help.pdfIn PDF document text
    • http://venira.su/2127349444m0tj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368998/normal_601a6def4490d.pdfIn PDF document text
    • http://suzamajotibe.mywebcommunity.org/52904003817.pdfIn PDF document text
    • http://zekamuwafevero.iblogger.org/genizu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370560/normal_5fc924c4e1f3f.pdfIn PDF document text
    • http://timurberg.ru/17754168819agmnm.pdfIn PDF document text
    • http://zathkatow.xyz/sutifobakitokubopao2338.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://walefusariwe.epizy.com/healthy_food_guide_chocolate_caramel_slice.pdfIn PDF document text
    • http://tosopipates.epizy.com/world_scholars_cup_debate_template.pdfIn PDF document text
    • http://fixetofona.epizy.com/st_charles_arkansas_duck_hunting_guides.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_off0000f470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF470 5268 bytes
SHA-256: 34500e65beb29a27d638817a8d4013da07cc7776e729801aa39583d548ba06a0
font_01_sfnt_off00010662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10662 11168 bytes
SHA-256: 38e21820bca637d1726bf67a2a0825544d2cc73e05cffdff121c64410463c902

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