Malicious PDF — malware analysis report

Static analysis result for SHA-256 e243d7c00b511f08…

MALICIOUS

PDF

72.6 KB Created: 2021-02-24 21:19:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 968e9407646433ef9049564f6e94e72c SHA-1: e8a1bccda05a0d8cfcc4c0ceb8608dc0d6ebdc1b SHA-256: e243d7c00b511f08d7e5c6a101baf2b8d8d88ee6772ade8de9717b8e68c2e084
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The primary URL suggests a lure related to 'tap titans 2 hack apk', which is a common theme in phishing and scam attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://jacksth.ru/wix?keyword=tap+titans+2+hack+apk PDF link annotation
    • http://xijulefabogi.getenjoyment.net/97862343733.pdfIn PDF document text
    • https://bugajujifupub.weebly.com/uploads/1/3/4/8/134894919/d9b958388.pdfIn PDF document text
    • http://openchambre.xyz/love_breakup_pic3tkqv.pdfIn PDF document text
    • http://help-lnstagram-verifycopyrgiht.com/college_world_series_baseball_2017hhd6g.pdfIn PDF document text
    • https://rizimajapalikum.weebly.com/uploads/1/3/4/6/134633575/bomefimuz.pdfIn PDF document text
    • https://pijawofixogut.weebly.com/uploads/1/3/4/0/134017865/82ec9236b67af99.pdfIn PDF document text
    • http://tesocoin.online/ejercicios_radicales_3_eso_resueltosos7na.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/how_to_make_a_financial_statements.pdfIn PDF document text
    • https://tesujirigagorin.weebly.com/uploads/1/3/4/8/134869290/4845885.pdfIn PDF document text
    • https://gisafonenum.weebly.com/uploads/1/3/5/3/135323636/d384c59ae3b6721.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/top_startups_2020_canada.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/how_to_set_citizen_eco_drive_watch_gn-4w-s.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/muxogijexuvufo.pdfIn PDF document text
    • http://desokore.medianewsonline.com/16513727700.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pozidijapepore.atwebpages.com/how_to_train_your_dragon_series_books_in_order.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/83693267012.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/android_symbol_appearing.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/4765041685.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_off0000e120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE120 5036 bytes
SHA-256: d85a71b32ca12d7fbcb234b3135c27af552251f0278c915472ccfaa37dc666e0
font_01_sfnt_off0000f249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF249 10344 bytes
SHA-256: 52f3a8acca83b9d15b9043df51f812b3504b70347ef0345be7a377006fea0ab0

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