Malicious PDF — malware analysis report

Static analysis result for SHA-256 667d70ed1fc510e1…

MALICIOUS

PDF

75.5 KB Created: 2021-03-27 22:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c8789adc41ae23e5beb60d61571069bf SHA-1: 57f83d62c9086e2990ec0dedca9ad1dbaedcd487 SHA-256: 667d70ed1fc510e1db24fd41080bd61b9ee32b06540feb0cfd1ac055a8bcc611
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/123?utm_term=candy+crush+saga+android+total+levels PDF link annotation
    • http://momadogago.iblogger.org/20447093148.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381340/normal_6051485732af2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424341/normal_5fde8e5aaa6d2.pdfIn PDF document text
    • https://cdn.sqhk.co/waxigapo/bhb6Gji/pewdiepie_sub_count_graph.pdfIn PDF document text
    • http://axecheat9.xyz/do_regions_bank_open_on_saturdayhyqnq.pdfIn PDF document text
    • http://selozufuwadapuw.66ghz.com/80370058167.pdfIn PDF document text
    • http://avtoshtorki.shop/honda_goldwing_1100_service_manual_free_download9m8nr.pdfIn PDF document text
    • https://cdn.sqhk.co/subilikiwi/hanfI0W/nuboxobukijukobaveruxoku.pdfIn PDF document text
    • https://cdn.sqhk.co/pajelidul/ha9rjdJ/vebirixozipiberafuloxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494663/normal_60381f7e1f43f.pdfIn PDF document text
    • https://cdn.sqhk.co/davusegeb/Zgdjj6r/road_traffic_control_games_online.pdfIn PDF document text
    • https://cdn.sqhk.co/devuzemalut/hgjdij1/narasimha_karumanchi_it_interview_questions.pdfIn PDF document text
    • http://santaparker.store/digital_multimeter_dt9205a_manualzxx87.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/eiagcib/bupiwulugajexe.pdfIn PDF document text
    • http://copyrights-notices-helps.com/vocabulary_workshop_level_e_unit_10_answers_vocabulary_in_contextb1gxl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459337/normal_5ffe8c62746dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444096/normal_5fd6628bc163c.pdfIn PDF document text
    • https://cdn.sqhk.co/vimerokil/jim25ji/tipubavin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wazotojemov/how_to_pronounce_hangul_alphabet.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/raladebumurur.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA3 5268 bytes
SHA-256: 23fc757546537f1a2057d277ca77d9308bc0f25171d30830c11e1c4de85b24fe
font_01_sfnt_off0000ee8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8B 10528 bytes
SHA-256: 45e2f1253d963f86bb7b07da59bbda3cd4bef64c87c52944dacf4255d7d2957d
font_02_sfnt_off00011268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11268 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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