Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda0b3801f78b4ed…

MALICIOUS

PDF

89.2 KB Created: 2021-03-19 01:36:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ff502305b228d494f88d4728c42f626f SHA-1: 79f6f20ff39a267b0318e90880f18ee514336bb5 SHA-256: bda0b3801f78b4edb9f586a4503dd0b7d7e63b69f2ca96ec6b5633e25ce978df
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm designed for SEO manipulation, with a high ML score and ClamAV detection confirming maliciousness. The embedded URL points to a site that appears to be a lure, using a search term related to appliance repair to attract victims. No scripts were extracted, but the overall structure and URL suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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=samsung+front+loader+washing+machine+error+code+e3 PDF link annotation
    • https://cdn.sqhk.co/timafewa/hOY8gfR/lagusozisazowobe.pdfIn PDF document text
    • https://cdn.sqhk.co/tufuboloruj/0J6ifky/my_android_won_t_charge_when_plugged_in.pdfIn PDF document text
    • https://cdn.sqhk.co/vizelupavew/jfmjcih/2873245535.pdfIn PDF document text
    • https://cdn.sqhk.co/gozawelesutu/bsJgdXW/download_mix_master_dj_game_mode.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/dfeda938-edce-43cc-ac86-ad1317e7f8ae/23843848480.pdfIn PDF document text
    • https://56a7be67-7dca-40da-a973-69ad719fb73b.filesusr.com/ugd/fedf23_6ea446230df945548e8c36d9e6a57f77.pdf?index=trueIn PDF document text
    • http://jifimurosesapu.atwebpages.com/pengertian_asidi_alkalimetri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c10f7018-2339-4d54-ac1e-6b21cdf47be3/daily_language_review_grade_8_week_13_answer_key.pdfIn PDF document text
    • http://revudipepofaten.myartsonline.com/report_writing_book.pdfIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_d7480569bd3d4d8faced2b1553a3f655.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rufonali/scottsdale_weather_report_tasmania.pdfIn PDF document text
    • https://2ac56fc1-f7ee-4366-9cb2-1681469c68ee.filesusr.com/ugd/b914b5_354ad5ccba29479a93d6af241410c29a.pdf?index=trueIn PDF document text
    • https://79e5ec13-148a-49e7-9308-7b7844992bd9.filesusr.com/ugd/1d149b_6069221612ef484d913242c50a23f6fc.pdf?index=trueIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_cce8f9e94f0e4f20a62b657e466d916d.pdf?index=trueIn PDF document text
    • http://zegiwewezenaro.myartsonline.com/43190114711.pdfIn PDF document text
    • https://7c3dd69e-6649-485e-b385-36acc2971cd6.filesusr.com/ugd/cf9ff1_6b959f33e2034aec81da13b7406c3512.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baxunaf/marketing_strategies_articles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24dd8776-d644-43e7-886c-eb6af498b2b4/truman_capote_a_christmas_memory_recording.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/newuruwiguwagipawubasib.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_off00010fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC1 5676 bytes
SHA-256: 175ef6fe9f3ff0cdb8be0a7bd808f433c59af8df4c76c5229f654e84d87e6b17
font_01_sfnt_off000122e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E9 11092 bytes
SHA-256: 0f91b86ef6a6320b98f9c83cb88687b77434b249347dace8b7ec2bb91a5ed9b4
font_02_sfnt_off00014880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14880 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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