Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fb5c6356ed44fe9…

MALICIOUS

PDF

82.9 KB Created: 2021-03-27 21:40:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ad6af156f6d4725018315919f241bf31 SHA-1: 8d5395fd09192dd202d441b5f1946ca71cec24c4 SHA-256: 8fb5c6356ed44fe9902edd9657b3d7f4f2d0b34e8f188b1b85c8cc875b805e45
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=oracion+de+alabanzas+a+dios+padre PDF link annotation
    • https://cdn.sqhk.co/dafisuwikib/uHhh3ij/79217600771.pdfIn PDF document text
    • http://jamosaxomexe.iblogger.org/damidojetasuwukejegujenup.pdfIn PDF document text
    • https://cdn.sqhk.co/bikuloxisage/e43lUhb/glory_road_soundtrack_imdb.pdfIn PDF document text
    • http://wukazejuze.22web.org/convert_file_to_word_for_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/tozegatopaxu/jvjbghn/rorejinagu.pdfIn PDF document text
    • http://cozyplacefor.rest/vibabibagajuegd8.pdfIn PDF document text
    • https://cdn.sqhk.co/tidelefuzin/LjfG82a/defense_battle_mod_apk_2019.pdfIn PDF document text
    • http://vinorama.fun/call_recorder_free_videoizzul.pdfIn PDF document text
    • http://derobidav.iblogger.org/armitage_shanks_sensorflow_21_tap_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/fMOgeVS/2999226021.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/xijesazo.pdfIn PDF document text
    • http://zosuvupetod.epizy.com/artificial_intelligence_future.pdfIn PDF document text
    • http://xovibole.rf.gd/chemistry_book_for_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/sepogu.pdfIn PDF document text
    • http://nedilopasosugop.epizy.com/how_to_learn_creative_writing.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/how_to_prevent_baiting_social_engineering.pdfIn PDF document text
    • http://difezazimo.rf.gd/animal_farm_chapter_2_questions_and_answers.pdfIn PDF document text
    • http://webidiwotew.epizy.com/4863431365.pdfIn PDF document text
    • http://motakajukig.epizy.com/72560381388.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10384 5284 bytes
SHA-256: 51971ec51c138a858dd3d8f453d9e5f416d8e8d5560d78c2cbdde1bba02b12dc
font_01_sfnt_off00011584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11584 12676 bytes
SHA-256: 92f520500ff4745cd655feac419e86649d9c97e98b66b9cf6daee18ec2f581a9