Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fc01ad36d56cbf0…

MALICIOUS

PDF

70.6 KB Created: 2021-02-24 09:45:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a3c020aeb5ee665e27f60ad9fc6e010b SHA-1: 115a625593e9d8d44a05a417602a2a9df03e0d5b SHA-256: 4fc01ad36d56cbf046e8f404d6854a41027d5fb4e73e6f0a196b65cf4430ec0c
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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://jacksth.ru/wix?keyword=python+pocket+reference+4th+edition+pdf PDF link annotation
    • https://kerawidirara.weebly.com/uploads/1/3/4/7/134746453/a1a465.pdfIn PDF document text
    • https://tamaxanafe.weebly.com/uploads/1/3/1/8/131856242/dexiv.pdfIn PDF document text
    • http://wuzubofetaxoger.iblogger.org/how_to_find_penny_stocks_on_robinhood.pdfIn PDF document text
    • https://favipipuwebex.weebly.com/uploads/1/3/5/3/135397367/2826048.pdfIn PDF document text
    • https://golinogejus.weebly.com/uploads/1/3/1/6/131606227/dogop.pdfIn PDF document text
    • https://maselevajaf.weebly.com/uploads/1/3/1/3/131398143/80b0948c1919c3.pdfIn PDF document text
    • https://gonibulurigudum.weebly.com/uploads/1/3/0/8/130874364/zuterozonebezobe.pdfIn PDF document text
    • https://tipolapuponawog.weebly.com/uploads/1/3/2/6/132696210/juzotekazikipexile.pdfIn PDF document text
    • http://tugidunamoz.22web.org/84091909092.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wokoziguroron.rf.gd/xezobevapubi.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/basketball_diaries_imdb_parents_guide.pdfIn PDF document text
    • http://sutobilesu.rf.gd/botomoxenuxosib.pdfIn PDF document text
    • http://kuvorewenosabe.epizy.com/wixavisesatobujekovu.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/31352332759.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/agartha_part_3_movie.pdfIn PDF document text
    • http://mupefapakag.rf.gd/bicycle_card_games_full_version.pdfIn PDF document text
    • http://bopufadepop.epizy.com/pijomaf.pdfIn PDF document text
    • http://kuwukazisopof.rf.gd/online_play_games_free_without_ing.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/opera_mini_app_for_java_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/95520018051.pdfIn PDF document text
    • http://jabisuluro.epizy.com/bungou_stray_dogs_dead_apple_ost.pdfIn PDF document text
    • http://woxomog.rf.gd/kenmore_ultra_wash_quiet_guard_clean_light_blinking.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_off0000d896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD896 5076 bytes
SHA-256: b490959ac21162e7ef46c341c6a84e1057ce68326886cd2cff450d455ee0fc70
font_01_sfnt_off0000e9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EB 10344 bytes
SHA-256: 96701037e53a4896355f0ed572448b8a57fe9c17f502d899be7f257d6512aa68

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