Malicious PDF — malware analysis report

Static analysis result for SHA-256 63cd75d5279bbf11…

MALICIOUS

PDF

102.4 KB Created: 2021-03-22 20:39:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 365612112550eac34bb8c1c46e4f791d SHA-1: 9874cd7329e25d0671f5bda5c3c67f96656474a7 SHA-256: 63cd75d5279bbf11e415e76cff3dbe2e13f0d7a59ff4dc1a8725a044452046a7
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or SEO spam document. The PDF contains numerous external links, with one prominent URL pointing to a link farm designed to attract traffic for keywords like 'pubg mobile guide map'. No scripts were extracted, but the presence of many external links suggests a redirection to malicious sites or further content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wix?keyword=pubg+mobile+guide+map
    • http://sabujunakeves.iblogger.org/measuring_the_rate_of_photosynthesis_in_elodea_virtual_lab.pdf
    • https://xumebarukez.weebly.com/uploads/1/3/4/6/134687090/e010f6.pdf
    • https://gufiferufa.weebly.com/uploads/1/3/2/3/132302963/ridaso-luwonizurirakuf.pdf
    • https://cdn.sqhk.co/womawuxinuge/jfFsdhd/idle_castle_mod_apk.pdf
    • https://keziwoxiw.weebly.com/uploads/1/3/4/0/134042402/lunefedosiwep.pdf
    • https://vonulimuwudepaf.weebly.com/uploads/1/3/4/1/134131723/zufeletewoxezuw.pdf
    • https://cdn.sqhk.co/vipujitebiki/schfbid/lil_tecca_did_it_again_1_hour_loop.pdf
    • https://cdn.sqhk.co/sipebesoxu/CbT1ghp/everfi_module_5_credit_scores_answers.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://fedorahosted.org/lohit
    • https://uploads.strikinglycdn.com/files/705b44d0-ff7e-4070-9702-69f69833adfa/how_to_program_suddenlink_remote_to_roku_tv.pdf
    • https://uploads.strikinglycdn.com/files/04910458-c634-4284-abb5-70d568519031/computer_parts_price_list_philippines_2020.pdf
    • http://tijilidimipep.epizy.com/weather_report_meaning_in_tamil.pdf
    • https://uploads.strikinglycdn.com/files/94e7434f-5ffa-473e-ad3e-7b172c40da4e/kukixerawagonisasepabiw.pdf
    • https://uploads.strikinglycdn.com/files/02245884-9028-4f99-a6d3-c5ec0e8b7bb3/vuwutejuxema.pdf
    • https://uploads.strikinglycdn.com/files/e0d4d061-fffa-4c48-ac9d-9fd0f92d0925/reborn_demon_king_anime.pdf
    • https://uploads.strikinglycdn.com/files/7b1f68cb-6afb-4272-84a2-8a19d6e5cf0a/dovuselepejojegaz.pdf
    • https://s3.amazonaws.com/jujojomojemiz/85497425108.pdf
    • https://uploads.strikinglycdn.com/files/3b3399b7-200d-42ef-a255-d9c31ba4979f/note_speller_worksheets_answers.pdf
    • https://uploads.strikinglycdn.com/files/463efa54-9198-4a22-86ff-1ceb8106fbd8/can_you_fail_padi_open_water.pdf
    • https://s3.amazonaws.com/figugipopar/13749504296.pdf
    • https://uploads.strikinglycdn.com/files/22a29e39-255f-4f6b-a1a0-cde74bc43dd8/first_90_days_template.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00016025.bin
7d3cfc860adcfb5569ea20405f7006c438e7691d8c2f7bf7e4ab82137be37d1b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16025 18128 bytes
font_00_sfnt_off0000fb0d.bin
f28e6374828c302f92023a297f830b1a737f29444feb431f1f7462a52d199cc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0D 4800 bytes
font_01_sfnt_off00010c1b.bin
79843388afd83062067a456a511876bc3685b60f738b13416cc2b9411e65e8a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1B 5144 bytes
font_02_sfnt_off00011d7f.bin
149738eb3e1d0bfb4a5732e89a115965e6f0cf3fc4971c694d3ce3619176544d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7F 6148 bytes
font_03_sfnt_off00012d5e.bin
f7c5ea75ac8adc99d2f09e6bd986a71d6bc376d17cb002ed19b368c5dc7ca3bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5E 17164 bytes
font_05_sfnt_off00017d17.bin
594de75a4c50384800cca2e53a6d4911277e31c825d4ad9b60bf251815ef6856		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17D17 2952 bytes

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