Malicious PDF — malware analysis report

Static analysis result for SHA-256 e75e1a710e7c3e4c…

MALICIOUS

PDF

76.7 KB Created: 2021-03-13 22:28:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 587efb051796751d6de32a2647f4e86b SHA-1: bec9a2445d08f7277d99265e8bb44db13e3fc701 SHA-256: e75e1a710e7c3e4caf504cb66952a7ac3651267e71b79a9739d6935e9c225cdf
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to 'beta blocker drugs list pdf'. The presence of external URIs and link farm heuristics indicates an attempt to direct the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/award?keyword=beta+blocker+drugs+list+pdf PDF link annotation
    • http://magnitoli-2ekran.site/84825228837n6dcj.pdfIn PDF document text
    • http://jijoxep.getenjoyment.net/sloan_flushmate_503_keeps_running.pdfIn PDF document text
    • http://kavoxujeledi.iblogger.org/angadi_theru_tamil_padam_ing.pdfIn PDF document text
    • http://jusapp.club/certified_ethical_hacking_tutorial8s1oh.pdfIn PDF document text
    • http://1green.space/22408062124pu5o2.pdfIn PDF document text
    • http://buliwomof.22web.org/free_wedding_invitation_templates_word_2007.pdfIn PDF document text
    • http://moshon.space/49811118300vypwf.pdfIn PDF document text
    • http://dostafood.xyz/25566879171i8866.pdfIn PDF document text
    • http://zoom-omsk.ru/rawiwitozasa5sl8m.pdfIn PDF document text
    • http://ruvogodozipabiv.scienceontheweb.net/what_is_a_seasonality.pdfIn PDF document text
    • http://vijuziruzunubiz.iblogger.org/88009657202.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/merriam_webster_crossword_answers.pdfIn PDF document text
    • http://tejujusaruke.epizy.com/how_to_replace_diaper_genie_carbon_filter.pdfIn PDF document text
    • https://933afb0c-60ca-4ff4-ba38-e7c804ca925d.filesusr.com/ugd/941881_64259eaa5efa4d95aee19d1213f25089.pdf?index=trueIn PDF document text
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_50f481ffbf234b97b6101cb46fc110aa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/wodulop.pdfIn PDF document text
    • http://piwukoge.rf.gd/suliwoxe.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_off0000ed41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED41 5576 bytes
SHA-256: 56f64869f2d67810638dc04f55b2ca899cec052a762af5bcc24abbe77fe160ed
font_01_sfnt_off00010043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10043 10964 bytes
SHA-256: da7969ae13889e93b5e97a89506b5db24ca1c5dcd27f653d905f395972dd55ef

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