Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca6bea88026aa17d…

MALICIOUS

PDF

71.9 KB Created: 2021-03-22 01:26:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0be6f357abf33f563ce38d26413bc7cb SHA-1: 72512d7aef7b6052c245550bf538c8de66af1242 SHA-256: ca6bea88026aa17d85ce18eb6f9d091a7d345233596f2909c106cf70df6f874b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one specifically targeting a search query for '24 hour fitness near millbrae ca'. This suggests a link farm or phishing attempt designed to drive traffic to malicious or deceptive websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/wix?keyword=24+hour+fitness+near+millbrae+ca
    • https://lopenedaxi.weebly.com/uploads/1/3/1/6/131606218/6733729.pdf
    • http://lorubuxetorifa.medianewsonline.com/rosirubemevimagafegodopaw.pdf
    • https://rowagikej.weebly.com/uploads/1/3/4/6/134678960/vowifol_legibazet.pdf
    • https://kokarino.weebly.com/uploads/1/3/5/2/135299240/eaad4c638.pdf
    • http://wuteziben.iblogger.org/sigmund_freud_theory_quotes.pdf
    • http://jipuvojenibomig.22web.org/learn_mandarin_chinese_reddit.pdf
    • https://nevomunetis.weebly.com/uploads/1/3/0/7/130740414/197822.pdf
    • https://mewuvirinikupu.weebly.com/uploads/1/3/4/5/134505229/22dca.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jawikaginixuxuz.rf.gd/added_touch_photography_order_form.pdf
    • http://tuzotulerijenej.rf.gd/corbettmaths_exam_style_questions_simultaneous_equations_answers.pdf
    • http://kutepiguzusudax.epizy.com/anti_aromatic_compounds.pdf
    • http://vefabafodibejeg.epizy.com/fuvufuzegavivenawone.pdf
    • https://2791e1c6-719d-47aa-bdc5-1556df251b63.filesusr.com/ugd/7757c5_a60ef1f84b684101aec0216536b79c71.pdf?index=true
    • http://zikoliduxa.atwebpages.com/what_is_a_group_theory.pdf
    • http://figawuvalefigo.rf.gd/the_oxford_history_of_board_games_download.pdf
    • https://s3.amazonaws.com/firigugixujotov/element_plugin_after_effects_cs6_free.pdf
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_fc262d7bb626445cad50842409106d8a.pdf?index=true
    • https://s3.amazonaws.com/lopadivupudexa/guwosumedefuwudefepujisad.pdf
    • http://bunopudo.rf.gd/wordscapes_uncrossed_answers_fresh_19.pdf
    • http://rogofideb.onlinewebshop.net/fetipiwixine.pdf
    • http://rujewaridulev.rf.gd/20630616709.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc76.bin
b26443abe59cc6ddc3be6057ce95b174e5dce57642a8b5bd696a9b5514aa4e0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC76 5388 bytes
font_01_sfnt_off0000eea1.bin
ecea875f3567f05e5e38cc5b2473fb00e02be1f20a7b08a5a7967ee9004db221		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA1 10368 bytes

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