Malicious PDF — malware analysis report

Static analysis result for SHA-256 75c0bde61ed20bb1…

MALICIOUS

PDF

86.4 KB Created: 2021-02-22 21:46:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ee2bb15a9ef68bf1119a90819cf37d0f SHA-1: f5f83512595d1522a64ca873b3db5c6516678ab3 SHA-256: 75c0bde61ed20bb1d1863d387e84da21d99d163215f0c9eb27b5b4716c7beee1
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to software and a date, suggesting a lure. The presence of multiple disposable domains and link farms points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=which+mechanical+software+is+best In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381737/normal_6026e8b9af5e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389585/normal_602251b43d734.pdfIn PDF document text
    • http://fastpysystem.online/lenivitje5gk.pdfIn PDF document text
    • https://xupubiwe.weebly.com/uploads/1/3/4/3/134339906/72f2e48.pdfIn PDF document text
    • http://fitokaps.xyz/gidinapuzuzabulel74uua.pdfIn PDF document text
    • https://zetaxufonepijak.weebly.com/uploads/1/3/4/3/134353616/ab34f46.pdfIn PDF document text
    • https://zakuxaposud.weebly.com/uploads/1/3/1/3/131382531/4960958.pdfIn PDF document text
    • http://fofikotopavabe.iblogger.org/jesukoriroruduzupujoso.pdfIn PDF document text
    • http://pet-guru.shop/23250582207u1ow6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448542/normal_6011ed85bacae.pdfIn PDF document text
    • https://dinorega.weebly.com/uploads/1/3/3/9/133999175/sakepikedutotub.pdfIn PDF document text
    • http://xruhdfo.site/25392825667gldjc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ratixifo/fuxegol.pdfIn PDF document text
    • http://davutawopoban.epizy.com/funeral_service_program_template_uk.pdfIn PDF document text
    • http://jatirud.rf.gd/trumpet_tune_henry_purcell.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/fallout_3_best_perks_guide.pdfIn PDF document text
    • http://birofasadonu.epizy.com/59827553152.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/32030456192.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/ronetitivokodojekigiv.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB80 5368 bytes
SHA-256: 8a6b54ad81bc7973185c698007baf0ad6b04befc14b639c4455ed9f2277eb3e9
font_01_sfnt_off0000fdaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAA 2168 bytes
SHA-256: 8cecb7dee196064a84c77f4d5fbf2dd215a8db8198ca05dee02df98a28508d9f
font_02_sfnt_off00010708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10708 16068 bytes
SHA-256: 09ff28df76442b3804d7828965e61ed1234dc0f875b2f7094e265867c4f150cc
font_03_sfnt_off000135cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135CC 16348 bytes
SHA-256: c7cfc138ee9fd9369b8b16460bde0d5057fa814c881a6723e1206d4699793506

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