Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea26c64454145a68…

MALICIOUS

PDF

103.3 KB Created: 2021-05-17 17:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a34614e997bb3fbf2ff255faca516cc6 SHA-1: abd144e9bda305b8b442305b3496efebd658cce4 SHA-256: ea26c64454145a68ce84bc4ab2f446c7891ed879cb9c3f5bdad64192b8a6d92d
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are part of a link farm designed to artificially boost search engine rankings. The document's content, though heavily obfuscated, appears to be a lure related to Acer tablet issues, directing users to potentially malicious URLs. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xajibur.ru/strik?utm_term=what+to+do+when+your+acer+tablet+wont+turn+on PDF link annotation
    • https://zitupakunetod.weebly.com/uploads/1/3/0/7/130739751/davakuzazinanol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382408/normal_6019b4e927a7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446273/normal_606c96b50e4fe.pdfIn PDF document text
    • https://pogiwubuwafax.weebly.com/uploads/1/3/0/7/130775808/vixisenisitaduvovir.pdfIn PDF document text
    • http://chisto-chisto52.ru/belukikocpfno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407062/normal_603a9671285ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371005/normal_6002fb3737867.pdfIn PDF document text
    • https://zepemotofilizag.weebly.com/uploads/1/3/5/3/135399015/jagezubutaruzi_bibex_vowuxumijulit_kuxos.pdfIn PDF document text
    • http://wide-mean.top/panunevejuiwk93.pdfIn PDF document text
    • https://ruzutemeba.weebly.com/uploads/1/3/2/6/132681300/pujetanu_dumoneragu_kasulosotikol.pdfIn PDF document text
    • http://nutristrike-shop.ru/gutujeh5sxk.pdfIn PDF document text
    • https://lufokozu.weebly.com/uploads/1/3/4/7/134755413/f075a8a5f06f769.pdfIn PDF document text
    • https://jafovoguna.weebly.com/uploads/1/3/4/0/134096268/6545773.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415308/normal_5ff714d8bfa5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455196/normal_5fd669a8368d5.pdfIn PDF document text
    • https://gabejopow.weebly.com/uploads/1/3/4/5/134597712/jekuzipuk.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/gimisorixosu/how_to_train_your_dragon_3_trailer_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/alien_shooter_2_reloaded_cheats.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/takaxofijabenewezeledano.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/ar-15_upper_receiver_forge_markings.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/hollywood_space_movies_in_tamil_free.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_off000147bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147BC 5028 bytes
SHA-256: 52a69d80dfa00fabd8461bd0dc42a9b2e12a53e420d541e796c2dd6da7aa19f6
font_01_sfnt_off000158de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158DE 11872 bytes
SHA-256: bbae6afc4d9ef42efe118f020b984bff4392e1b8e8b6e8a4ea34186368fbb1c0
font_02_sfnt_off0001815e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1815E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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