Malicious PDF — malware analysis report

Static analysis result for SHA-256 d823f336b2ca2070…

MALICIOUS

PDF

96.8 KB Created: 2021-03-26 05:19:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f90e283e0bb5c84d5f980753913bccd3 SHA-1: 37dd7df26910da272db58063ec39df8d504ac60a SHA-256: d823f336b2ca207001d7d988617b6cbd1e6c8e108896e5202ed8a7abb9a24ba9
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, with one identified as a potential malicious URL (resalured.ru). The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to create a link farm for SEO manipulation or to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://resalured.ru/wix?keyword=custom+rom+finder+apk
    • http://uscreditcheck.info/ship_oil_pollution_emergency_plan_sopep7tqeh.pdf
    • http://katipef.medianewsonline.com/understanding_and_using_english_grammar_4th_edition_free_download.pdf
    • https://cdn-cms.f-static.net/uploads/4386839/normal_5fd5f04dacb6a.pdf
    • http://smartcreditcheck.info/comptine_dun_autre_t_piano_notesrqvux.pdf
    • http://tokio-2020.fun/wosomop93f81.pdf
    • http://topsalon.xyz/gym_jones_300_workout_resultsv0ony.pdf
    • https://cdn-cms.f-static.net/uploads/4384652/normal_603e9378671d6.pdf
    • https://static.s123-cdn-static.com/uploads/4476282/normal_5fcf046a7cf8a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://d848e4b6-662b-4424-a759-963270729452.filesusr.com/ugd/30e015_cf82739785d443ae9db3f8bc7f0cda1a.pdf?index=true
    • https://s3.amazonaws.com/zarusegibitumet/maytag_dishwasher_quiet_series_300_parts.pdf
    • http://limoxukuk.atwebpages.com/universal_laser_systems_pls6.150d_price.pdf
    • https://s3.amazonaws.com/zetubakuz/7531101309.pdf
    • https://s3.amazonaws.com/dobikasukavu/sony_wega_tv_no_remote.pdf
    • https://s3.amazonaws.com/fomaralunex/human_body_organization_and_homeostasis_worksheet.pdf
    • https://s3.amazonaws.com/ribowexulo/kibozawusefafoberok.pdf
    • https://s3.amazonaws.com/xovekolamoxe/travel_tourism_competitiveness_report_2013.pdf
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_18bf1dd0e9f84f6d83ae9ad647abdeec.pdf?index=true
    • https://8df9d1b7-8f6e-49e1-bdac-c9da4d4291fd.filesusr.com/ugd/12c198_9e973040601f43eeaeb402a01bc38e9d.pdf?index=true
    • https://s3.amazonaws.com/bulolimepol/tyt_th-9800_manual_francais.pdf
    • https://s3.amazonaws.com/sisaxu/calypso_song_video.pdf
    • https://s3.amazonaws.com/futamo/http_connected._mcgraw-_hill._com_answers.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f498.bin
edf517a561ed5132c6c1d5718ac6ff9d870a00e6f43a91762fd168a2279cca75		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF498 6440 bytes
font_01_sfnt_off0001048e.bin
0487abc3dbfd115fb54cb5ebf2cc55f0a434dd4be80ddbb5a34b326375304594		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1048E 5124 bytes
font_02_sfnt_off000115dd.bin
aecc933578c88a4a0026d98ff72f9a4db1debada343779c99ba3a2fcacd7fc44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115DD 2784 bytes
font_03_sfnt_off000121a7.bin
1d58dc28c7a3b729ab043af0334e81c1526d65798404f0f93c63ecbf5ff751a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121A7 11060 bytes
font_04_sfnt_off0001479f.bin
8a72d3497eba5eb97cef44b7928e79fb87e15f7caf04afab3bda550946821c31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1479F 16764 bytes
font_05_sfnt_off00015efa.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15EFA 4324 bytes
font_06_sfnt_off00016cad.bin
551918360585b1590efa6fd2a215345b2f702067d151a0e4b48cfa7490b57960		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16CAD 1736 bytes

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