Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab27185d7fbf9989…

MALICIOUS

PDF

102.5 KB Created: 2021-05-04 03:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5fbc91fa8f357a2b5ae942516679402 SHA-1: 7011d59be9b12003401396e24881a8bc2b3f3749 SHA-256: ab27185d7fbf998945edfcaba617b4aae29743f44da71e0ba0ec46d9bebca59c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=volver+al+amor+marianne+williamson+audiolibro
    • http://jitokinut.iblogger.org/pojevedonur.pdf
    • https://zolalaroka.weebly.com/uploads/1/3/4/5/134591985/kawasifaresajeba.pdf
    • https://cdn.sqhk.co/surodamiz/ghghgiS/true_surf_cheats_2020.pdf
    • https://nupigefaxobabu.weebly.com/uploads/1/3/1/0/131070289/1de553f2b47e5.pdf
    • http://mabirimelu.iblogger.org/mosses_and_liverworts.pdf
    • https://cdn.sqhk.co/lutaxudepoje/iPgigfV/14205705906.pdf
    • https://cdn.sqhk.co/nexetifosam/oFAhe4o/28451520674.pdf
    • https://xupubiwe.weebly.com/uploads/1/3/4/3/134339906/suwujixulimozejipam.pdf
    • https://cdn.sqhk.co/pevizopubok/avfW7gj/ravens_steelers_game_time_today.pdf
    • https://cdn.sqhk.co/dajebala/Libh9cC/wedirafiradulejiruweb.pdf
    • https://gorixekaliwe.weebly.com/uploads/1/3/4/4/134439057/kejum-fisomaganaf-nenofo.pdf
    • https://cdn.sqhk.co/lawikuto/ggdjG4B/fisufugiwipigovokonobamu.pdf
    • http://kurekarer.22web.org/free_acymailing_newsletter_templates.pdf
    • https://cdn.sqhk.co/dolafita/ibhZBjg/fekamaxakoram.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ea346b71-4b0a-4dc0-85e0-973aed69ba43/who_invented_homework_and_what_year.pdf
    • https://uploads.strikinglycdn.com/files/053905ac-0185-410c-89d3-6e5e9858fbae/bofufezugutibolazove.pdf
    • http://resisimokopi.epizy.com/84632885168.pdf
    • http://velumosak.epizy.com/registration_form_sample_template.pdf
    • http://didajuna.rf.gd/49665976186.pdf
    • http://woxutonugosafer.epizy.com/56581982881.pdf
    • https://uploads.strikinglycdn.com/files/4f4c89a6-dbfc-4582-a10f-e136436ac483/24638375844.pdf
    • http://redokolaxoviwuk.rf.gd/best_bose_qc15_replacement_ear_pads.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012db9.bin
c4289e828609e7fb2bddb9442d493dc589a01ff41bb80bb2e2f7a8a93c6fb2f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB9 5228 bytes
font_01_sfnt_off00013f75.bin
b879aa5bb215e2ea85b65ad7b9f099b257de73ee00940c51269e4ab71f0e2f5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F75 4092 bytes
font_02_sfnt_off00014f61.bin
74b42be654d662692fd91466f63b45839a43db609dec55b17114a642bcf23de1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F61 12372 bytes
font_03_sfnt_off00017713.bin
975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17713 16312 bytes

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