Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a5bcd2b6e89276…

MALICIOUS

PDF

83.0 KB Created: 2021-03-12 09:40:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88e355b93cccb8a319b76c304b4154d9 SHA-1: db1bd6020d1c77bdf504bb129032765de6af5e3e SHA-256: f2a5bcd2b6e89276a21da98014fa7132815a5b2e8bd511dd612672727095cdeb
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, with several pointing to disposable hosting and link farms, suggesting a redirection mechanism. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the PDF is part of a link farm designed to funnel traffic. While no scripts were explicitly extracted, the PDF structure and URI usage are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://druttle.ru/123?utm_term=set+tbl+activesheet.+listobjects+table1%2529
    • https://remogomati.weebly.com/uploads/1/3/4/7/134748537/buzubipub.pdf
    • http://juxowupekabaf.mygamesonline.org/yard_machine_snow_blower_22_oil.pdf
    • http://memexeti.66ghz.com/66080039905.pdf
    • http://fitnesspack.net/pupufabapavamusoxtzaed.pdf
    • http://ita-fitness.fun/sumetowategoxasyqs78.pdf
    • https://movediwifed.weebly.com/uploads/1/3/2/6/132695881/4047076.pdf
    • http://mezogevap.mypressonline.com/67861142644.pdf
    • https://dufubixapitosig.weebly.com/uploads/1/3/4/5/134503348/9980168.pdf
    • http://kitazixozakabu.sportsontheweb.net/transtorno_da_ansiedade_generalizada.pdf
    • http://littlenat.space/niwojovylajo.pdf
    • https://puwibovur.weebly.com/uploads/1/3/4/6/134639487/menes.pdf
    • http://italia-doc.space/46633398991eomqh.pdf
    • http://smartcreditcheck.info/lana_del_rey_video_games_joy_orbison_remix2ujw6.pdf
    • http://pisibebix.22web.org/bright_line_eating_meal_plan.pdf
    • https://voxonororipesap.weebly.com/uploads/1/3/5/3/135383222/eaf1b.pdf
    • http://xisumagogali.getenjoyment.net/24799920220.pdf
    • http://xejevojesinil.22web.org/microsoft_azure_iaas_interview_questions_and_answers.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/919fb441-d67c-4654-a122-aa557ff586b9/85759801709.pdf
    • http://xotaferuju.myartsonline.com/mailchimp_tutorial_2020.pdf
    • http://selewexa.rf.gd/rerujadapamunogop.pdf
    • http://xidatozekef.epizy.com/sekumuzifenu.pdf
    • http://zibinafo.rf.gd/bahubali_1_telugu_songs_320kbps.pdf
    • https://uploads.strikinglycdn.com/files/1aa1aa47-9ba5-44d8-9248-6426a5b9a169/watch_how_to_eat_fried_worms_full_movie_online_free.pdf
    • http://gojaxuga.epizy.com/lidudevilegurelibav.pdf
    • https://uploads.strikinglycdn.com/files/ab2b7406-18da-4f9e-be0a-234854f18dc4/how_to_hack_inquisitormaster.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcfb.bin
d7749b9f0bd1eef9a552153e80c2543f7e95f56c09dcbfce3293698a2dcaaa1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFB 5328 bytes
font_01_sfnt_off00010f30.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F30 1800 bytes
font_02_sfnt_off000117be.bin
33dfbc301854eada69b0c6db6ebbdb008dab8583dc4694e06356934a271e4e06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117BE 11224 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.