Malicious PDF — malware analysis report

Static analysis result for SHA-256 72001a88b00a166a…

MALICIOUS

PDF

79.8 KB Created: 2021-04-04 22:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74a1076f857e2088b570ce331f5ed864 SHA-1: d7d897987876361d729e343bbbd089739fd187cb SHA-256: 72001a88b00a166adc0d44ecc9ab5dfe1f12e9e61a1e6caecfe717203ac0a2a9
96 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a PDF phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to children's learning materials, which is a common tactic for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://golowaki.ru/123?utm_term=aprender+a+leer+y+escribir+ni%25C3%25B1os+pdf
    • https://cdn.sqhk.co/kezavilageg/hbjjghr/rabilatujobewolimowugup.pdf
    • https://cdn.sqhk.co/gajamomol/ijeDieh/canarm_ceiling_fan_manual.pdf
    • http://wivevadevenumet.mywebcommunity.org/lizogomimopigapi.pdf
    • https://cdn.sqhk.co/lilaxikixo/c60t1nU/las_vegas_slot_machines_youtube.pdf
    • https://cdn.sqhk.co/dibirolinu/AdibibH/norse_gods_family_tree.pdf
    • http://papotupeti.iblogger.org/85691883675.pdf
    • http://maxobujixeweden.sportsontheweb.net/70435451549.pdf
    • https://cdn.sqhk.co/busumodofu/KjigiYA/adventure_ball_free_download_full_version.pdf
    • https://cdn.sqhk.co/tulovixegoke/ingjxjf/rubowixasapekixulun.pdf
    • https://cdn.sqhk.co/fotenulutis/hggjfih/stick_fight_supreme_spider_battle_mod_apk.pdf
    • https://cdn.sqhk.co/nadokikado/Wjbjihg/zamupizusalodexitavikix.pdf
    • http://trokot-shopnew.online/discovering_the_lifespan_3rd_edition_downloadxaplr.pdf
    • http://kismykeitio.best/flying_aptitude_test_practiceyplkv.pdf
    • https://cdn.sqhk.co/bovokolel/jcgfIic/kaiser_flu_shot_schedule_2020_california.pdf
    • http://1xbet-regi.site/organic_chemistry_nomenclature_questionsdmjpy.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://xoxigibutu.epizy.com/sonodi.pdf
    • http://vuvulew.rf.gd/kazaxiwosiraxave.pdf
    • http://mevomum.epizy.com/66797344812.pdf
    • http://runesufosufej.rf.gd/crawl_subtitles_malay.pdf
    • http://vutevesofu.rf.gd/logoboxa.pdf
    • http://zilosazalepuzu.epizy.com/introduction_to_economic_zoology.pdf
    • http://lavisekenesavof.myartsonline.com/pdf_to_dwg_online_without_email.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e6.bin
3d16bef1719558293876dbbb0d424122c9e470d2546707d9853c564d62e735c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E6 5300 bytes
font_01_sfnt_off0000fba3.bin
698badfbe8d51b29454156f4a0be21e854c222c29e5c2ab8d471ae4400fd066e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA3 11684 bytes
font_02_sfnt_off0001210a.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1210A 4324 bytes

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