Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb6e68165c612ab6…

MALICIOUS

PDF

74.6 KB Created: 2021-03-18 06:03:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f69dfe37122637278c24d7395c461b8 SHA-1: 3611b66ef634380d46ee1a683d85ad15ab914655 SHA-256: fb6e68165c612ab667cdcefb3e5b124b2b33ff1d6d4f2bed9c729bffccc8dabd
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'easy piano songs for dummies pdf', likely a pretext to drive traffic to the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/strik?utm_term=easy+piano+songs+for+dummies+pdf
    • https://cdn-cms.f-static.net/uploads/4365525/normal_603568e16bfb0.pdf
    • https://vetitigozep.weebly.com/uploads/1/3/1/4/131437709/kidodiwo-goxifurepiwor.pdf
    • https://mefosenide.weebly.com/uploads/1/3/4/7/134715399/9104992.pdf
    • http://pixidilivutep.medianewsonline.com/vatufutixawex.pdf
    • https://cdn.sqhk.co/xujutitula/bsgehgg/53993331361.pdf
    • http://nogurufegu.mygamesonline.org/atari_flashback_7_power_supply.pdf
    • http://chategratis.online/voctave_being_alive_sheet_musiclc9sr.pdf
    • https://static.s123-cdn-static.com/uploads/4451044/normal_5fec27cb2d3ab.pdf
    • https://static.s123-cdn-static.com/uploads/4471235/normal_5fcaa54914c65.pdf
    • https://salotoniv.weebly.com/uploads/1/3/5/3/135305201/a09f833b.pdf
    • https://static.s123-cdn-static.com/uploads/4484356/normal_5ff427001c9a4.pdf
    • https://cdn.sqhk.co/rebibenizuj/kwUi361/commercial_agency_law_uae.pdf
    • http://nupifijaw.getenjoyment.net/3111859124.pdf
    • https://xogudefimo.weebly.com/uploads/1/3/0/7/130775634/1931453.pdf
    • https://cdn-cms.f-static.net/uploads/4476954/normal_6016142811f27.pdf
    • http://lynciguest.com/stopping_by_woods_on_a_snowy_evening_main_theme1moxr.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zuwarikufaz.epizy.com/5th_grade_nys_ela_test_prep_worksheets.pdf
    • http://mopobarijokix.rf.gd/gogroove_flexsmart_x2.pdf
    • http://vawirir.atwebpages.com/joindre_un_dans_word.pdf
    • http://wometopususap.rf.gd/79408442878.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5bf.bin
60076b0819f957367bbfd35b64a6a669ebd1014038f65e6f1afd33b3e89637dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BF 5388 bytes
font_01_sfnt_off0000f80c.bin
ba29302501da8dd512b720256a0ecd40080ec53a310dee2e69651c11b207a373		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF80C 11128 bytes

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