Malicious PDF — malware analysis report

Static analysis result for SHA-256 7141c31c6685ad43…

MALICIOUS

PDF

83.7 KB Created: 2021-01-18 17:05:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1553b95738a950c34c4c1d33dc845083 SHA-1: 62df41ae73a9817f8a7e9639732fa440db817bfe SHA-256: 7141c31c6685ad432372e24fb726447a3edb5b3e312f058ed455faabc6b41461
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffmen.ru'. This, combined with ML classification and ClamAV detection, strongly indicates malicious intent. The embedded URL likely serves as a lure to download a second-stage payload or redirect to a phishing site.

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffmen.ru/aws?utm_term=acrobat+professional+writer+free In PDF document text
    • https://site-1171149.mozfiles.com/files/1171149/cruises_hiring_near_me.pdfIn PDF document text
    • https://dexisuliraj.weebly.com/uploads/1/3/5/3/135346252/bejixova-rolokex-voxepel.pdfIn PDF document text
    • https://ruwadegefanum.weebly.com/uploads/1/3/4/1/134108857/043bf02.pdfIn PDF document text
    • https://cdn.sqhk.co/tufuboloruj/QgdvhgW/best_spades_app_with_jokers.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/bngcgg5/baligab.pdfIn PDF document text
    • https://ruxapumuful.weebly.com/uploads/1/3/4/6/134682584/f7f21f1c55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463810/normal_5fc08816d8c9d.pdfIn PDF document text
    • https://site-1176787.mozfiles.com/files/1176787/31669284408.pdfIn PDF document text
    • https://serofewaz.weebly.com/uploads/1/3/1/3/131379274/66c6a49.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lanowilovuviwib/desert_oasis_lab_rescue.pdfIn PDF document text
    • http://navadolaje.rf.gd/constipation_guidelines.pdfIn PDF document text
    • http://zokitidekav.epizy.com/hospital_cad_library_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/10865335207.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/percentage_increase_and_decrease_non_calculator_worksheet.pdfIn PDF document text
    • http://jidoreno.epizy.com/surarero.pdfIn PDF document text
    • http://galiwasik.rf.gd/facebook_messenger_apk_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/4th_grade_math_test_with_answers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29E 4156 bytes
SHA-256: 65c65e01e982f2de28b4d88edfdb454a91cbd14d0446bdaf7ae5e714fcedea92
font_01_sfnt_off0000f141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF141 5228 bytes
SHA-256: 2828eed4b54044ca563ef122c7f3d8ec12f50c7505895b4148faa6698e0c0e12
font_02_sfnt_off00010331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10331 12064 bytes
SHA-256: 9d8e0df09cb75ddf8285e6528d1a2591ada388dc3a35f181991ebe0ffea35411
font_03_sfnt_off00012a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A41 16488 bytes
SHA-256: 6a519f54f5516a02950eed31c222a33217e1daf964577f37e3b402c146ae77cd

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