Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f4f07df7aa202f…

MALICIOUS

PDF

84.0 KB Created: 2021-03-08 04:13:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 513cbf473425035b2838a9c2338bab5b SHA-1: a1c66439aaabb059d46e46ded8a0ab45ccf54eac SHA-256: 67f4f07df7aa202f38f86e89cab7b434fe8629eb55e851744e10ad134e05b75d
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier returned a high probability of maliciousness. The document body, though heavily obfuscated, contains text related to a 'periodic table puzzle lab answer key' and an embedded URI points to a URL that appears to be part of a phishing or malware distribution campaign. No scripts were extracted, but the presence of an external URI suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=periodic+table+puzzle+lab+answer+key PDF link annotation
    • http://idslim-italia.site/20140595958q48c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481999/normal_602482867dd45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379500/normal_600d78ac996af.pdfIn PDF document text
    • https://cdn.sqhk.co/jiguluzufuwa/Hjagcjc/nurse_wellness_coach_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401711/normal_601bc9d2f2bb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421330/normal_5fe66a741cbba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494149/normal_600f637ddefd4.pdfIn PDF document text
    • https://cdn.sqhk.co/siloneza/civ6Gib/60349836182.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/ggjjpjc/chemistry_study_guide_ib.pdfIn PDF document text
    • http://mikrotikwizard.com/83414277653eb6ys.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462352/normal_6032852d443a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470698/normal_5fe1377b33801.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/zidzigK/ramukomulufigiberi.pdfIn PDF document text
    • http://magnetfix.store/how_to_screenshot_on_logitech_keyboard_k400v2shh.pdfIn PDF document text
    • https://cdn.sqhk.co/jagapifa/icojiij/hot_wheels_unlimited_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387430/normal_600549c050708.pdfIn PDF document text
    • http://copyrightviolationcenters.com/1001_spells_bookumdlf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408875/normal_602ef0294c056.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nigimul/76610801914.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/wow_classic_maraudon_guide_deutsch.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/what_grade_is_lexile_500.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/google_chrome_free_internet_manager.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/11699855829.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/what_is_total_parenteral_nutrition_tpn.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/todulonelogozajufefipi.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/domidu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC2 5396 bytes
SHA-256: 4ec3a4f3f4e7aa8968fce0979098554c60b1982407c18a6817c6c36fee99bbcb
font_01_sfnt_off00010f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F37 10372 bytes
SHA-256: f193f30ceb9227dfafdbf5132e87fec171e8dbfc3adc56da6fab238da2cf68f1
font_02_sfnt_off00013275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13275 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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