Malicious PDF — malware analysis report

Static analysis result for SHA-256 59bddc9a898f0b56…

MALICIOUS

PDF

129.5 KB Created: 2021-04-23 12:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e8560e7afc4ed8844123b59e2d6093b SHA-1: 9b3bea9def5d4e1d8915cdef119920d38963a6bc SHA-256: 59bddc9a898f0b561c65a8bab33ff464e3f3435fdd82b228140674d75a419214
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, as malicious. It contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to external content, likely for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=history+of+economic+thought+book
    • https://dufadijikog.weebly.com/uploads/1/3/5/3/135325035/xumupegolam.pdf
    • https://cdn.sqhk.co/sofizagumup/xPhfmVY/direzodesuwuwitugim.pdf
    • https://cdn.sqhk.co/rodofusavivi/gd3igjd/gakibaximelelemenakirono.pdf
    • http://subbellassecret.com/vortex_cloud_gaming_hacked_apk_free_downloadpbxl7.pdf
    • http://leftoutclub.com/61983517558novqg.pdf
    • https://cdn.sqhk.co/linidivez/0gcB0hc/army_tank_games.pdf
    • https://devudupaf.weebly.com/uploads/1/3/4/8/134880603/gifozipobole-pikazato-zotababaj-rarakejijexor.pdf
    • https://cdn.sqhk.co/gajeneset/RRihqpb/furugunoxoxowu.pdf
    • https://cdn.sqhk.co/nalomuxe/2gdiflh/kuvupugudifimenatumafa.pdf
    • https://cdn.sqhk.co/jefutubup/biiijha/perunulipajutonepis.pdf
    • https://cdn.sqhk.co/zosiwikiw/aijIhhf/gedija.pdf
    • https://cdn.sqhk.co/nasanoroge/dIjiejc/legend_of_kung_fu_rabbit_full_movie_english.pdf
    • https://zarogamotelim.weebly.com/uploads/1/3/4/3/134344532/8998498.pdf
    • http://meinekarten.best/lewebunivetibeloxaliyueqj.pdf
    • https://cdn.sqhk.co/mebinolopuf/5jvaijA/articulos_de_reposteria_cerca_de_mi.pdf
    • http://instasavephoto.com/84814089079x8tot.pdf
    • https://cdn.sqhk.co/nufomewo/fzqjghd/juventus_jersey_2019.pdf
    • https://cdn.sqhk.co/fegadosijete/Bx4tGhf/t_i_game_toca_mystery_house.pdf
    • https://cdn.sqhk.co/demanajinu/UuieUdD/samsung_level_u_wireless_headphones_replacement_parts.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c9d51f49-2db2-4d84-bd18-f920c2f31d6a/club_car_precedent_light_kit_voltage_reducer.pdf
    • https://uploads.strikinglycdn.com/files/dcc05434-7873-4a31-a2a3-9006505b0d20/the_language_of_god_chapter_summary.pdf
    • https://uploads.strikinglycdn.com/files/97f2b322-a8de-4b29-a5f4-7a08179c7436/dymo_letratag_label_maker_power_cord.pdf
    • https://uploads.strikinglycdn.com/files/5d6a1106-b254-4aa8-bafe-eb3986a97efb/robinair_34788ni-h_filter.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.

FilenameKindSourceSize
font_00_sfnt_off0001bf58.bin
5398f61da51d098c6d7f3a372b2ba91966c2bd8178a48f0a6710dc423ebf645b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF58 5320 bytes
font_01_sfnt_off0001d15c.bin
bad4933111f86589ebb6e309b25dd840f9edb44443e973752407f8309af8a652
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D15C 11824 bytes