Malicious PDF — malware analysis report

Static analysis result for SHA-256 203d5bacac94a698…

MALICIOUS

PDF

87.8 KB Created: 2021-03-20 16:46:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 3089968a1811e0a50af2f601c8833afc SHA-1: 99b4223a93798fc0780ffc8193ef1751443d04fe SHA-256: 203d5bacac94a698a02d21478e349ad7986a1530a68f5e4fe2c13b1e463e2051
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains numerous external URIs, with one specifically pointing to 'https://ponafet.ru/wix?keyword=gradpoint+answers+world+history', suggesting a lure to a potentially malicious site. The PDF also exhibits characteristics of a link farm on disposable hosting, further indicating malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/wix?keyword=gradpoint+answers+world+history PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4487419/normal_5fe5743a40747.pdfIn PDF document text
    • http://nosinoski.shop/truck_safety_slogansv6yl8.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/30c3f3b82.pdfIn PDF document text
    • https://kawuzuke.weebly.com/uploads/1/3/1/6/131606938/4704965.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/ahhIjiJ/xaveforoxuve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388819/normal_5fca990f3e7bb.pdfIn PDF document text
    • http://mmamba.ru/sat_math_level_1_score_conversion9japd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473375/normal_5fcdc4cbd5015.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414334/normal_5fcd300f50d5e.pdfIn PDF document text
    • https://pijusutuwo.weebly.com/uploads/1/3/1/4/131407307/kuvezojoxomefe_vomuvidelerut_revilimedawuj.pdfIn PDF document text
    • http://nugekurobeju.iblogger.org/21639272393.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454822/normal_5fcec12e29b2e.pdfIn PDF document text
    • http://lomigizukifomor.22web.org/free_voip_call_software_for_pc.pdfIn PDF document text
    • http://ketousa.site/walking_dead_cast_season_9_betavfo2i.pdfIn PDF document text
    • https://cdn.sqhk.co/bebetirifam/5ijPiid/kavajofosogiru.pdfIn PDF document text
    • https://komiwafaka.weebly.com/uploads/1/3/2/7/132712661/5641b.pdfIn PDF document text
    • http://pukawezo.iblogger.org/bharathiar_university_bba_books_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f56c95b1-54ba-4a9c-a0b8-e58941b77fcf/ego_lawn_mower_blade_sharpening.pdfIn PDF document text
    • http://mavexewaxomem.rf.gd/aadhar_card_online_update_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83cdfd66-78f5-489d-b11e-6d36c019e6ca/washington_state_road_map_with_cities.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeb8bb4e-e3a2-44f1-9d39-efbe451f91bd/fobagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca7d8909-e61b-40da-8336-dc19a13a65ab/pandaria_flying_wow.pdfIn PDF document text
    • http://wixuvixur.rf.gd/mosawilobadajejukobopolup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93a1251e-7988-4973-a472-e887a7d7af1f/47707412348.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_off00011837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11837 5272 bytes
SHA-256: 5e1ef4a695222e996eb4e6685c0a13533cbfe9125b324504276883b65c7633d1
font_01_sfnt_off00012a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A33 11744 bytes
SHA-256: 6d377923ecb3fbd523ec49fa04960a7f90ec47a71a54c6e2f2b2f962b5abfb87

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