Malicious PDF — malware analysis report

Static analysis result for SHA-256 99f6cf7c30a29bb3…

MALICIOUS

PDF

104.4 KB Created: 2021-03-03 12:43:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d6409bd981fc35e31a9cf3947a469cd SHA-1: d501a8fb17402bf9dffb699a099c0dbcd8a8a0a1 SHA-256: 99f6cf7c30a29bb39c1042ce4ea2e71fef6ce92962b5669a0e3c057d7c9d2a6b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the heuristic PDF_SEO_LINK_FARM firing point to an attempt to drive traffic to malicious sites.

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://golowaki.ru/wix?keyword=multiple+regression+excel+formula
    • https://cdn.sqhk.co/muwazubivotu/giaaugd/rebolawikejinovinugemuwu.pdf
    • http://tinaxugamonow.22web.org/ley_de_ohm_concepto.pdf
    • https://rigefenasoje.weebly.com/uploads/1/3/0/7/130776330/fepenadopipug.pdf
    • http://xuvaguwanolinu.66ghz.com/ekg_practice_strips_printable_with_answers.pdf
    • https://cdn.sqhk.co/fusuwudofal/bGjbuhf/kesutugenojajadu.pdf
    • https://wifamiwipefap.weebly.com/uploads/1/3/0/7/130738562/9409448.pdf
    • https://cdn.sqhk.co/lunexubafexo/jjyd3ti/orbia_tap_and_relax_mod.pdf
    • https://mitivowa.weebly.com/uploads/1/3/1/6/131607237/3359549.pdf
    • https://cdn.sqhk.co/pizililiv/Nhfpjbq/xilenapuwivikototatibuwoj.pdf
    • https://cdn.sqhk.co/pulazapusaw/amtOzKG/50162760461.pdf
    • http://juxisuzuvu.iblogger.org/71845661212.pdf
    • https://zixijatujomalul.weebly.com/uploads/1/3/5/9/135962278/5305963.pdf
    • https://cdn.sqhk.co/tatidukigag/hcnhcjj/kiwimagabaxapetijoz.pdf
    • https://cdn.sqhk.co/gotofebelu/3Ejihdt/truck_driving_truck_simulator_racing_games_mod_apk.pdf
    • https://cdn.sqhk.co/jumosanex/dhggiji/cool_facts_about_mexico_city.pdf
    • https://cdn.sqhk.co/nasubivapu/XFidibO/land_rover_defender_110_hse.pdf
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jirabumibami.epizy.com/goodbye_my_almost_lover_song.pdf
    • https://s3.amazonaws.com/wunojipu/53039784908.pdf
    • http://liboditi.rf.gd/58236490383.pdf
    • http://manutejewugowol.rf.gd/dragonfable_rogue_guide.pdf
    • https://s3.amazonaws.com/zarusegibitumet/am_looking_for_a_girl_called_jennifer_song_mp3_download.pdf
    • https://s3.amazonaws.com/pujirageg/61520600311.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://www.gnu.org/licenses/gpl.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00012f4a.bin
c731fbc1439a5ec41b77e7cc3636c11a12c6ac99fe1bd1029addd1228c8d38bc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12F4A 8592 bytes
stream_005_off000174bd.bin
7d25ef5f6d192bccff1f9322c563ec20f60d5918d3bc9a2c46cc9c91611abfa0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x174BD 18976 bytes
font_00_sfnt_off00011cef.bin
95231e825399f0ea50cc8f9a376b79aafd6530e1066a7e7bbb0dfc3b35eface7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CEF 5408 bytes
font_02_sfnt_off00014734.bin
6928cd1bcb00f13990f9a5d99c65c879d35292b26990a2e84797b2e5a80a8da6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14734 14092 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.