Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd26c12a3e3e6695…

MALICIOUS

PDF

79.7 KB Created: 2021-03-26 12:44:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a7f143051787874d125974a497087e98 SHA-1: 8ff07e46abbe6a1c9937004f18b34304ce019b24 SHA-256: fd26c12a3e3e66952bb0ef2f0ac8be6c2161b7e70eb9370d28170f67ab82882a
186 Risk Score

Malware Insights

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

This PDF file is flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm designed to redirect users to potentially harmful websites. The embedded URLs and the document's structure point towards a phishing or scam attempt, likely using the 'Fallout new vegas companions quests guide' as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/123?utm_term=fallout+new+vegas+companions+quests+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456705/normal_604975111f9f3.pdfIn PDF document text
    • https://cdn.sqhk.co/tiniwakutosu/jfXYhcg/mineral_spirits_home_depot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415782/normal_5ffc46f69b9be.pdfIn PDF document text
    • https://nijodumedogale.weebly.com/uploads/1/3/6/0/136082157/pifarenukowota.pdfIn PDF document text
    • http://xikapajami.mypressonline.com/meiosis_stages_diagram.pdfIn PDF document text
    • https://cdn.sqhk.co/tijonodevi/CiijdZe/tukijemevorixamafenewive.pdfIn PDF document text
    • https://cdn.sqhk.co/gagunewatevo/MZXih7l/tajegubibovaperubotal.pdfIn PDF document text
    • https://fuzimisadu.weebly.com/uploads/1/3/5/3/135319831/kutedazidikuwax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481988/normal_5ffb3391ad8aa.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/htjbB4H/33398819937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405206/normal_60458a63d1a22.pdfIn PDF document text
    • https://bawufavipefal.weebly.com/uploads/1/3/0/7/130740211/logabir.pdfIn PDF document text
    • https://cdn.sqhk.co/gederanew/lEn5dhc/94276285653.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489994/normal_5ffd5ebfcab76.pdfIn PDF document text
    • https://cdn.sqhk.co/dijowasedop/gZgYJhJ/donkey_kong_2_game_download.pdfIn PDF document text
    • https://pagazamis.weebly.com/uploads/1/3/5/3/135310118/wexejem-kegejezerop-wefalakato.pdfIn PDF document text
    • https://cdn.sqhk.co/rudixika/izahj7g/drone_shadow_strike_2_mod_apk_new_version.pdfIn PDF document text
    • https://tegupovo.weebly.com/uploads/1/3/0/7/130775278/5b35a178759a13.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mifotabelimudon.myartsonline.com/current_affairs_july_2020_download_in_english.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/fosovivelemop.pdfIn PDF document text
    • http://pimoxonevuwewax.atwebpages.com/didetolalavivebuv.pdfIn PDF document text
    • http://tediguku.atwebpages.com/xorijakudaranukojoroj.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_off0000f668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF668 5528 bytes
SHA-256: d34b9ea3e6da24dad3576fe3bad7fb09e93525f5c5b056d8398f7ff14401ad1c
font_01_sfnt_off00010943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10943 12660 bytes
SHA-256: 7b9a38dac06fb5195d486cef12c299817eec8b9fdc2f3d58f224c3d267ea5b48