Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7def540d5c9eacd…

MALICIOUS

PDF

74.9 KB Created: 2021-03-17 22:06:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: cb9f405599db07b83320eac4102d0e87 SHA-1: 5b7a85cc29d19f46dcb29cb51c80bd7348da4882 SHA-256: a7def540d5c9eacde82bcfaf93016aaddc9e7a9cf229b277db9cca7c6c3fff9d
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a significant number pointing to external resources, indicative of a link farm or phishing attempt. One primary URL, 'https://golowaki.ru/strik?utm_term=wings+of+fire+graphic+novel+3+pdf', is presented as a search result for a graphic novel, suggesting a lure to a malicious site. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/strik?utm_term=wings+of+fire+graphic+novel+3+pdf PDF link annotation
    • https://cdn.sqhk.co/besawevij/ibnpbIi/hypermarket_3d_mod_apk.pdfIn PDF document text
    • https://vavavutexe.weebly.com/uploads/1/3/4/4/134441002/lejigivisave.pdfIn PDF document text
    • https://cdn.sqhk.co/vivepovugeli/iibgcZK/dujoxikiz.pdfIn PDF document text
    • https://tunibedexorole.weebly.com/uploads/1/3/5/3/135350281/saralazubakaxive.pdfIn PDF document text
    • https://cdn.sqhk.co/fuludasowipu/BigS3hc/45593548387.pdfIn PDF document text
    • https://cdn.sqhk.co/zavilisuga/fhmihsw/4560001969.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluwumenad/hagihBf/mozart_lullabies_nursery_rhymes_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/rexukewanej/gps8gfy/xebabuduri.pdfIn PDF document text
    • https://bimuwosexiwo.weebly.com/uploads/1/3/1/1/131164043/81606.pdfIn PDF document text
    • https://fanesorugetefex.weebly.com/uploads/1/3/1/3/131383934/2413432.pdfIn PDF document text
    • https://cdn.sqhk.co/tujuvemevo/Yjbjbhe/54928351471.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/bokasalogivemigitikezum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88c5279f-f865-4299-81d6-1ff0d5e46829/how_to_set_up_voicemail_on_blu_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/23256323425.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/turip.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/92296412779.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/92341087603.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/zavujibugijopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e94bf7c0-1e70-43f0-b39a-83fa979ceb68/32604463695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37007845-e994-4a30-959f-5449cce4ee4d/what_is_reiki_level_1_attunement.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/candle_light_song_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eac1a00f-52db-40cf-a477-e8ca61e66f63/acer_aspire_m3470g_cpu_upgrade.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/free_music_on_iphone_8.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD847 5360 bytes
SHA-256: ad60611b14bfb7884faf48fdf4ddd6a08271536a171eb70b6358a63bd1d03734
font_01_sfnt_off0000ea83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA83 10476 bytes
SHA-256: e6e424e43b46f784565baac2fb59a9a0769862899fd245b46dab9317506548de
font_02_sfnt_off00010e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E66 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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