Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a3002d607b003d0…

MALICIOUS

PDF

72.8 KB Created: 2021-01-21 12:51:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 778245137ed95b10c8c47141debc1dd9 SHA-1: 22f54680b36ff60b709936f56e68c3e083910290 SHA-256: 2a3002d607b003d0ef60cd73241510ea0dd655bb30edfcfcba3697d3d677cd04
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded links, with at least one identified as a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to educational materials, likely to trick users into visiting the malicious sites. No scripts were extracted, but the presence of many links and the malicious redirector strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 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.
  • 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/aws?utm_term=similarity+and+congruence+gcse+questions+and+answers In PDF document text
    • https://site-1176112.mozfiles.com/files/1176112/28744590992.pdfIn PDF document text
    • https://komuwewolidixat.weebly.com/uploads/1/3/4/8/134871085/300d2816.pdfIn PDF document text
    • https://wipusometava.weebly.com/uploads/1/3/4/8/134846349/wolotomiro_wawijiripokenum_gonasoxapodewi.pdfIn PDF document text
    • https://site-1212713.mozfiles.com/files/1212713/gta_5_heists_money_guide.pdfIn PDF document text
    • https://site-1193425.mozfiles.com/files/1193425/3948193634.pdfIn PDF document text
    • http://jeruxawi.iblogger.org/dsssb_je_civil_answer_key.pdfIn PDF document text
    • https://site-1245629.mozfiles.com/files/1245629/sasali.pdfIn PDF document text
    • https://site-1168056.mozfiles.com/files/1168056/1058965828.pdfIn PDF document text
    • https://mepubigavij.weebly.com/uploads/1/3/4/5/134599646/b596a.pdfIn PDF document text
    • https://site-1166605.mozfiles.com/files/1166605/brain_fun_tricks_brain_test_brain_out_puzzles.pdfIn PDF document text
    • https://taxudomajifi.weebly.com/uploads/1/3/4/1/134108655/nezibip-gesizedesa-wovuru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448733/normal_5fd89565b6a95.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vaxutusurinav.epizy.com/aligned_vision_laser_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/veryfitpro_instruction_manual.pdfIn PDF document text
    • http://jinibodakix.epizy.com/i_miss_you_korean_drama_song.pdfIn PDF document text
    • http://pasivete.epizy.com/muzaguralupavigomijuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/b._e._r_forever_mine.pdfIn PDF document text
    • http://sekekubonigav.rf.gd/gramatyka_j_angielski.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96B 5680 bytes
SHA-256: 822f0707e96752c4d3424854bac63246f751b13c02c9fa1ec46a116df5762714
font_01_sfnt_off0000dcae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAE 10388 bytes
SHA-256: f6dbffcae9b374838743f9b02c6a38d713066aec1ac7696f559221baccf53c57
font_02_sfnt_off00010065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10065 16072 bytes
SHA-256: 062f8a7185608a18dbd56baf48eb14c791e3c6ea8866a2ddd6a03467109098f1

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