PDF malware analysis — malicious · b9900395692451dc

MALICIOUS

PDF

69.6 KB Created: 2021-03-23 19:47:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 44a5e6760c809b98b8eb21153936bce0 SHA-1: 744edb131b3478810b9906801e58add55e6798c1 SHA-256: b9900395692451dc6b0f98d65d0d36789af98089bd887516ed7726626f6c1ee5

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a textbook, aligning with common phishing tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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/aws?utm_term=integrated+chinese+1+textbook+pdf
- https://cdn.sqhk.co/mikedeto/gkhhrhp/16593151311.pdf
- https://static.s123-cdn-static.com/uploads/4470688/normal_5ff1c643554e9.pdf
- http://nesobaka3.xyz/nordictrack_elite_700_reviewsb2pr.pdf
- https://cdn.sqhk.co/keridola/29ehc2J/2_player_super_hero_tycoon_codes_2019.pdf
- http://clipshd.design/nintendo_switch_online_app_apk_latest_version71je2.pdf
- http://instapodarok365.site/the_great_gatsby_vocabulary_chapters_3-5hurjb.pdf
- http://fepemewavitik.66ghz.com/dd_books_reddit.pdf
- https://cdn.sqhk.co/zativojor/sShdgeo/forward_financial_bank_thorp_wi.pdf
- http://netosav.22web.org/pofixe.pdf
- http://xajoraxi.22web.org/how_to_use_ps3_controller_on_ps4_2019.pdf
- https://cdn.sqhk.co/seponidozit/e5hh1WN/5364709399.pdf
- http://videohost.space/12820695537g7q0n.pdf
- http://rababugizegir.22web.org/kigaxiwodigis.pdf
- https://cdn-cms.f-static.net/uploads/4410989/normal_603d6160dcd1a.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/teximikamukubo/presentation_formal_word.pdf
- http://rusozetowozo.epizy.com/chrono_trigger_rom_pt_br_snes.pdf
- http://gikosetopetidun.rf.gd/dasebepilajomoxizafaxaba.pdf
- http://dativolulonal.epizy.com/45453723237.pdf
- https://s3.amazonaws.com/fifuto/eidolon_warframe_guide.pdf
- http://zisemofojakuvew.epizy.com/77242954261.pdf
- https://s3.amazonaws.com/zulezov/pejadubetu.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d043.bin` `c3fea01e70a2ce88d83dd4b71723a0c81491ce90a2dcecbb70c4dbc162dbc84c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD043	5644 bytes
`font_01_sfnt_off0000e37b.bin` `786d72a8d838306f194162355c81e1c53d2064989ec64f9bce9aebf341f84c1e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE37B	10564 bytes

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