Malicious PDF — malware analysis report

Static analysis result for SHA-256 5af1d68f32d93832…

MALICIOUS

PDF

77.6 KB Created: 2021-03-23 14:09:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 1b781c1bed6071602413290ed5c326c0 SHA-1: 2223ae13e907c57c0cd7a991012fc63396bfafc2 SHA-256: 5af1d68f32d938324664d8241b74fa4677d2e010a609c60db625ba46e54149ec
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, with a high concentration on disposable hosting, suggesting a link farm designed to redirect users. The embedded URLs, such as https://lozipotod.ru/123, are likely part of the malicious redirection chain. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit users by directing them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/123?utm_term=calculating+kinetic+and+gravitational+potential+energy+worksheet PDF link annotation
    • https://ruwevupezo.weebly.com/uploads/1/3/4/0/134013147/toraxapolis_dodefebe.pdfIn PDF document text
    • https://cdn.sqhk.co/zokosofu/gcucgj1/7198839418.pdfIn PDF document text
    • http://mezajozugabaso.getenjoyment.net/munefuzudof.pdfIn PDF document text
    • https://gawubodukajine.weebly.com/uploads/1/3/0/9/130969599/bonudumaratozuzupod.pdfIn PDF document text
    • https://jorosavuzeloda.weebly.com/uploads/1/3/4/7/134755790/zemugezizepava-fifagakuxawama-wagumatixurena.pdfIn PDF document text
    • http://logefekur.22web.org/3516956841.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/jT5iaBn/dj_mixer_music_player_download_pc.pdfIn PDF document text
    • http://ledozikatiresev.scienceontheweb.net/arabic_to_urdu_dictionary_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/jUV9Hub/13157220081.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/jwIHghW/piano_keyboard_classes_near_me.pdfIn PDF document text
    • https://ziwupaxibupava.weebly.com/uploads/1/3/4/3/134379030/zabigugafibar_tufabukeger.pdfIn PDF document text
    • https://cdn.sqhk.co/lixepupo/5hgheQr/nopafuw.pdfIn PDF document text
    • http://dexiwakuxabef.medianewsonline.com/tomidivegujajelojus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/abcc2002-8b34-4457-af73-4cdccd44dc93/how_many_pages_in_the_book_the_woman_in_the_window.pdfIn PDF document text
    • http://sajomapujozokux.onlinewebshop.net/dopabudetez.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/arraylist_java_android_studio.pdfIn PDF document text
    • http://wozitoso.atwebpages.com/karerezodateror.pdfIn PDF document text
    • http://zonidagaxa.epizy.com/kolkata_bangla_folk_song_free.pdfIn PDF document text
    • http://fusifovizit.rf.gd/molubetekapukufelinitemin.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/lutakevav.pdfIn PDF document text
    • http://tokumeki.rf.gd/william_s_burroughs_junky.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/sorugawamexelubug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f434b177-ce81-47a4-b8a3-f20f64d63f36/lejexedaledugudufomefuvip.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/bowuvoger.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA3 5560 bytes
SHA-256: 53d27a1c713e77da78e47e5938d61fcc233030628b39015b947008177f46f327
font_01_sfnt_off0000ff9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9B 11912 bytes
SHA-256: 7c3dbb5b70c85fa890c3f289d7921bec3de5d1452ada053d745893ff3dddd0e1

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