Malicious PDF — malware analysis report

Static analysis result for SHA-256 922610c195b47f26…

MALICIOUS

PDF

79.1 KB Created: 2021-03-16 11:02:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f0729c4915dab3e9ace9079d03db6eb1 SHA-1: d37bb172e4515062c9efb95621e3ef5bea578559 SHA-256: 922610c195b47f260dedae6d861ae25437b3e4e50cf2efb27ddb14548b3e89f9
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'jottigo.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, contains text related to making a manual block machine, serving as a lure.

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://jottigo.ru/strik?utm_term=how+to+make+a+manual+block+machine PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451231/normal_603c176b59c32.pdfIn PDF document text
    • https://jatufabafalili.weebly.com/uploads/1/3/1/6/131637938/4796967.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474478/normal_5fffeecaa2630.pdfIn PDF document text
    • http://wowuwifun.iblogger.org/wegelonarifamiwafad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483864/normal_601d56d7536c9.pdfIn PDF document text
    • https://disemorabegelam.weebly.com/uploads/1/3/1/3/131383982/buzupukifigagol.pdfIn PDF document text
    • https://kunubukom.weebly.com/uploads/1/3/4/5/134599245/d0d62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_602f98c17a8ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369923/normal_5fff26c88408e.pdfIn PDF document text
    • https://nadebexipopajin.weebly.com/uploads/1/3/4/6/134678264/labok_zadozawesa_nizegabewagu_jugudu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388416/normal_6036c0fa779fb.pdfIn PDF document text
    • http://jevopapivixepe.iblogger.org/lucid_dreams_sheet_music_clarinet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457298/normal_6049ec2f917c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487658/normal_5fd9e21fd1df8.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/viromibukoleliw/who_wrote_the_first_tafseer_of_quran.pdfIn PDF document text
    • http://wujumowe.rf.gd/29719524873.pdfIn PDF document text
    • http://murorutikuba.rf.gd/template_powerpoint_2010_p.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/brainstorm_verb_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/safinazevawajoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b32f658-9adb-4ef1-accc-6f797362003b/how_to_test_a_golf_cart_battery_charger.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/jefamufogibarenudeletize.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/93918579702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ba893b0-a217-49b3-ba3f-cbf7648675ac/how_much_to_build_an_indoor_sports_facility.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_off0000f6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B3 5024 bytes
SHA-256: 687d138a3c2cbe346cf0466541d79209dddab42f2ea50f8b5410357bd0967dc4
font_01_sfnt_off000107b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B2 11640 bytes
SHA-256: 8afb569cb37f8a083b1a300622e8e8bbca9abbf1b87b996bda2aa93c20460255

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