Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd868f8aef76c71…

MALICIOUS

PDF

75.6 KB Created: 2021-03-03 07:36:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a835c60ad65c62eed4798f61746bad62 SHA-1: 544469e62e6d7c79637040db3815e42b044b69c1 SHA-256: dfd868f8aef76c716ea02c975a45533342a04bd47adedc0c0da7bc8367596b5a
104 Risk Score

Malware Insights

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

The sample was detected as a malicious PDF by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware lure. The embedded URL, https://dafemum.ru/wix?keyword=according+to+evan%2527s+income+and+expense+statement+answer+key, suggests a phishing attempt related to financial statements. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to exploit users via deceptive content and external links.

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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://dafemum.ru/wix?keyword=according+to+evan%2527s+income+and+expense+statement+answer+key
    • https://cdn-cms.f-static.net/uploads/4365649/normal_603690e96ee6b.pdf
    • http://setokanekema.mygamesonline.org/fadakonaguxewafup.pdf
    • https://cdn.sqhk.co/lojenozasila/jbXhbge/pajifovezasebodevedif.pdf
    • http://nowukusox.mypressonline.com/what_words_describe_a_rainforest.pdf
    • https://static.s123-cdn-static.com/uploads/4414494/normal_600741a74d4c0.pdf
    • https://cdn.sqhk.co/zokelotosa/Ucig7id/super_adventure_r_2020.pdf
    • http://vabenawak.iblogger.org/wokefirebudum.pdf
    • http://dafagaketa.sportsontheweb.net/how_to_use_bissell_proheat_pet_spot_cleaner.pdf
    • https://cdn-cms.f-static.net/uploads/4381340/normal_602cdfa186b74.pdf
    • http://sunufosabupes.scienceontheweb.net/nelozakatonuwamevofum.pdf
    • https://cdn.sqhk.co/lidumezuvir/nhcFgfl/fruit_king_corpus_christi_tx_hours.pdf
    • http://xomutukegadoj.mypressonline.com/dirt_devil_ez_lite_canister_vacuum_cleaner.pdf
    • https://cdn-cms.f-static.net/uploads/4402478/normal_5fd6f69921727.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wuliwopiveti.rf.gd/what_is_the_scofield_bible.pdf
    • https://s3.amazonaws.com/zesixefe/wururibivovilidisonad.pdf
    • https://s3.amazonaws.com/xabalaru/anbe_sivam_songs_ringtone.pdf
    • http://tidegofavinugaw.epizy.com/stranded_deep_game_32_bit.pdf
    • http://fabovodowep.epizy.com/52670055715.pdf
    • http://wosepejodobedaf.epizy.com/kensai_mage_guide.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_off0000e7e4.bin
206c8512db88d655c3b269530ff4a38ecb60f1f5cb9a4459f5f56834d80963aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E4 5772 bytes
font_01_sfnt_off0000fba0.bin
8f46c7d7dd9a80134c4d764513aa34147484b1f82486acad91d2ba120a0e2850
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA0 11276 bytes