Malicious PDF — malware analysis report

Static analysis result for SHA-256 c22addd15a9aaafe…

MALICIOUS

PDF

84.6 KB Created: 2021-03-25 12:14:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 87d9f101af87175f0ca7e4b093f8c72d SHA-1: 287025a88eb991932b974a9c2df4cbd081c9896c SHA-256: c22addd15a9aaafe40e026632bfef3145b2044fc5b9fb1e5603b16148da62844
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=top+game+hacking+websites PDF link annotation
    • https://cdn.sqhk.co/sobupepokor/mbBgcgf/xesogiwarenuriwogi.pdfIn PDF document text
    • https://cdn.sqhk.co/gabisolovima/gi5hahf/pacsun_jeans_women.pdfIn PDF document text
    • https://paxowudozu.weebly.com/uploads/1/3/6/0/136095727/995fd.pdfIn PDF document text
    • https://cdn.sqhk.co/taxotuzu/hhifjbB/aliexpress_full_lace_wigs_human_hair.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/jcEFlCf/doperi.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/f73iijb/moxizaxetujenemulaxupuzax.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/cjatibG/silicon_valley_bank_deutschland_jobs.pdfIn PDF document text
    • https://bajorenurelop.weebly.com/uploads/1/3/0/7/130739037/50d24.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/5Kkhfig/winklevoss_twins_facebook_settlement.pdfIn PDF document text
    • https://cdn.sqhk.co/dujagazatad/IIjfhjN/guess_the_movie_name_by_picture_bollywood.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/50Ke09Q/93508847965.pdfIn PDF document text
    • https://cdn.sqhk.co/gajeneset/hjNhedE/vedutinifib.pdfIn PDF document text
    • https://cdn.sqhk.co/wifepodilojo/fvDhzjh/36939589514.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/DiiLfhc/best_offline_music_player_for_android_without_ads.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://82c1a4a6-0aea-44ab-842b-07cb5bdde860.filesusr.com/ugd/aafee9_65b1a311df364a56b59e2d82a37d39ec.pdf?index=trueIn PDF document text
    • https://006b50d4-ad2a-4261-8279-34542eb0d7b0.filesusr.com/ugd/a640e9_383d2b3ff46d44cca14622f6b3665711.pdf?index=trueIn PDF document text
    • https://0e67983c-e844-40c9-b604-97311ec94efe.filesusr.com/ugd/6e13d9_561d2dc726954fd5907d9538b620e6ba.pdf?index=trueIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_d9b39318f7fb4c838653d410e710a139.pdf?index=trueIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_19de6ad81f054c00b08a0a2cdc714a11.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D7 5464 bytes
SHA-256: b0d4a83cd22d7af619bbbe0ecdbaba974b28725dae77d0a8ad1000426e64c138
font_01_sfnt_off00010763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10763 11672 bytes
SHA-256: 82a9482f00bbfed90de60147c6a8d82c52cfcdd3bbdcfec506f10405754b3fe6
font_02_sfnt_off00012f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F94 16352 bytes
SHA-256: 4c01831bdfffbafff55fd55c88415eb2201da44b622d6ec769a15ea8bc50db3f