Malicious PDF — malware analysis report

Static analysis result for SHA-256 23aa71ae80fe47d9…

MALICIOUS

PDF

58.4 KB Created: 2020-10-24 03:40:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b83432049073166da9990e32297d845f SHA-1: 3ab7ce2ed81a76783a324df9e78d9c7fc9067c81 SHA-256: 23aa71ae80fe47d98f99a7bd46229bb900a823d05b49bb0ae752a8aac719b8a6
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be the same as the malicious redirector. This suggests the primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?keyword=comme+agrandir+une+image+en+medibang In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383471/normal_5f8d7f56af7b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f8705d9be710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375507/normal_5f8e796224780.pdfIn PDF document text
    • https://gawubodukajine.weebly.com/uploads/1/3/0/9/130969599/7916553.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/lativavutofotaz_kunes_suwivi.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/xereromejiv-koxozirusoror-moxonujis.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/903439.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/tadib-pepalitegugoj.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/197253.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/bupirufuxa-bovob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/2464/7061/files/lugudedew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3318/8762/files/ropipegokegujaxafamodamup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3445/6476/files/60384198103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8515/9843/files/disposable_digital_camera_walgreens.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8929/7557/files/bajillion_dollar_properties_season_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1714/1909/files/yard_machine_chipper_shredder_10_hp_reviews.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2009/4120/files/trinity_audrey_carlan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8288/4289/files/xbox_360_memory_card_walmart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8190/1253/files/gidowaxabitilaluwaxabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1799/3877/files/nioh_armor_sets_bonuses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/7424/8600/files/bomefar.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_off0000a178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA178 4980 bytes
SHA-256: 43dff8f789d921b625e07dc037e4f0b56dd2ebba27a5a3ed92cebaa38da4cecc
font_01_sfnt_off0000b249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB249 12640 bytes
SHA-256: 24a97988a6b5e8dbb9e435f355539f9e4629269ed5b225908c89dfa419803b1d

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