Malicious PDF — malware analysis report

Static analysis result for SHA-256 11aa03f1b80f881f…

MALICIOUS

PDF

80.4 KB Created: 2021-03-19 13:52:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e328c601dfa74cadae8ea78f7c118dbd SHA-1: bffd16162d0a77c0da8c991ae9e4db040acf738c SHA-256: 11aa03f1b80f881fef87510000b4349d3eebb989f40c344935d6168721fe52fe
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and link farm heuristics suggests the primary goal is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=alcatel+one+touch+fierce+2+cyanogenmod PDF link annotation
    • http://choosenews.space/ancient_egypt_lapbookqasq9.pdfIn PDF document text
    • http://juvivufokif.22web.org/transformations_of_rational_functions_worksheet_answers.pdfIn PDF document text
    • https://fogisavelubid.weebly.com/uploads/1/3/5/2/135299906/1685138.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/43214219456.pdfIn PDF document text
    • https://fejagirizow.weebly.com/uploads/1/3/4/5/134525681/e2ed47d5ad.pdfIn PDF document text
    • http://okrasote.info/kenmore_elite_dishwasher_model_665_thermal_fusexgofo.pdfIn PDF document text
    • https://wivixovipi.weebly.com/uploads/1/3/4/4/134442696/3417562.pdfIn PDF document text
    • https://pujowuvorokom.weebly.com/uploads/1/3/5/3/135347933/2161d171b347701.pdfIn PDF document text
    • http://ital-tess.space/boite_en_papier_origamioxnib.pdfIn PDF document text
    • http://zuxuvikewi.sportsontheweb.net/architectural_design_in_steel_download.pdfIn PDF document text
    • https://fukuzodi.weebly.com/uploads/1/3/5/3/135329923/kajugilubifafipix.pdfIn PDF document text
    • https://bafizotadax.weebly.com/uploads/1/3/4/7/134761596/ffe36d9f3b.pdfIn PDF document text
    • https://lurufakezudaka.weebly.com/uploads/1/3/4/8/134884294/ba45fbd87942a.pdfIn PDF document text
    • http://lami-lashes.site/beseneninegdo.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://uploads.strikinglycdn.com/files/f229d49c-92b6-41c8-8da1-ac12355540b2/82601037182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd95a233-998a-4e88-8eb8-0aae0c355842/pippin_vocal_score.pdfIn PDF document text
    • http://wanudag.rf.gd/bio_data_form_for_job.pdfIn PDF document text
    • http://jutivowewinuled.epizy.com/41403330514.pdfIn PDF document text
    • http://kabitivawenavox.rf.gd/71268063481.pdfIn PDF document text
    • http://duverakonu.rf.gd/49994866605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a80a6c9-6676-47fd-8967-29aa51d2cbc8/65919217367.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_off0000eaed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAED 5364 bytes
SHA-256: 2d4b57b20f15e8328d1811c86663055dbe6c3a0fc5e13e3ee0480900eb959c16
font_01_sfnt_off0000fcff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFF 12764 bytes
SHA-256: 24e7e00b6f509e5c41abffcc3d4dc3dc6bf09546ba8c9da873a98f9eb20bcdf2
font_02_sfnt_off0001261a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1261A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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