Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca6ed1d7ade5555…

MALICIOUS

PDF

79.2 KB Created: 2021-03-15 08:12:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b2ac41f479ce3db301729628a2266379 SHA-1: 51053bfa9b951d9a038a52df647e989a4b583605 SHA-256: 2ca6ed1d7ade5555dcb760aa65068d1c96d638999bbc0fb841aa4e5d035045e5
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 0.9993

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://dafemum.ru/strik?utm_term=freelance+graphic+designer+meaning PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484363/normal_600858f0194f1.pdfIn PDF document text
    • http://pibarulajido.getenjoyment.net/what_is_the_main_idea_of_the_way_to_rainy_mountain.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_602b61f3cc280.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386834/normal_6030939ac412e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473640/normal_6021beb9ca742.pdfIn PDF document text
    • http://pabukelib.66ghz.com/common_core_math_printables_for_kindergarten.pdfIn PDF document text
    • http://dokukuke.mypressonline.com/oedipus_tyrannus_sophocles_sparknotes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373259/normal_603b6a84474c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487201/normal_5ffb43315c251.pdfIn PDF document text
    • http://maladametugal.iblogger.org/tom_sawyer_and_huckleberry_finn_2014_full_movie_online_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391624/normal_5febc151bf0b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409395/normal_602823c76a699.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/bonozemez.pdfIn PDF document text
    • http://netolenogafa.getenjoyment.net/jazowofemolon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f395d2f2-f939-483b-815f-81062d4747ff.filesusr.com/ugd/be2697_89056de134cb435db125adbe3479d3a2.pdf?index=trueIn PDF document text
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_36cc513e53fb44ad8485248ea83b02f0.pdf?index=trueIn PDF document text
    • http://regipikiwubadov.epizy.com/home_door_design_catalog.pdfIn PDF document text
    • http://pazepoxi.atwebpages.com/batarowegulona.pdfIn PDF document text
    • http://sadevimesi.rf.gd/barcode_reader_win_10.pdfIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_4e5ef29ac6514c999d63021449bd7c74.pdf?index=trueIn PDF document text
    • http://kobinegugagikag.epizy.com/5_3_1_boring_but_big.pdfIn PDF document text
    • https://aefb6378-f3ca-470a-b9d2-22936542d087.filesusr.com/ugd/fe129c_da0d7f7fcf7249a28bad9ec1e82d93bc.pdf?index=trueIn PDF document text
    • http://webukoxaxox.rf.gd/nilitabez.pdfIn PDF document text
    • http://jelemomibupu.rf.gd/nakuxelixileniz.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_off0000f973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF973 5444 bytes
SHA-256: 6ce13f3a53b4c9af871300bff9ec9558a564bd38884971ba789a4869bd8f1e62
font_01_sfnt_off00010bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCA 10424 bytes
SHA-256: 67c0707779e0c129616ffbb6c8093276c519ca09677062e8ca4c8c4cd611825b

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