Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b5f71059a57f9bf…

MALICIOUS

PDF

72.5 KB Created: 2021-01-31 21:02:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e9f14239e908e064d31e00767559cd71 SHA-1: 646b67319f09b29e9071e9eb5c28631fb79abdfb SHA-256: 5b5f71059a57f9bf4b2bf490f11bd1cccf94ae651b40db08f6f2d7a216bb450b
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, potentially for further exploitation.

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://traffset.ru/wb?keyword=osrs%20wyvern%20bones%20vs%20dragon%20bones PDF link annotation
    • http://1ux.site/820706707286x2g6.pdfIn PDF document text
    • http://rodina38.ru/refalarumekelubegfylv.pdfIn PDF document text
    • http://vatojaginasi.22web.org/20927789341.pdfIn PDF document text
    • http://zetomanebegox.iblogger.org/marvel_movies_apk.pdfIn PDF document text
    • http://dapabikokewe.iblogger.org/15262892394.pdfIn PDF document text
    • http://axecheat5.xyz/how_to_get_alliance_teleport_guns_of_glorya2wqj.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/vavale/90717800377.pdfIn PDF document text
    • http://loxazugexola.epizy.com/counter_strike_global_offensive_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/work_anniversary_card_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/sql_server_reporting_services_2019.pdfIn PDF document text
    • http://mulozeraxepe.epizy.com/kegunegufunadutodubiwif.pdfIn PDF document text
    • http://javajese.epizy.com/bbc_good_food_guide_cheesecake_recipe.pdfIn PDF document text
    • http://monulaw.epizy.com/android_ndk_install_location_windows.pdfIn PDF document text
    • http://fekalalorupip.rf.gd/achieve_3000_level_set_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/12934912811.pdfIn PDF document text
    • http://gozajogef.rf.gd/sam._cengage_answers_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/wedikujifilegizigi.pdfIn PDF document text
    • http://riwexakax.epizy.com/zufitew.pdfIn PDF document text
    • http://genenapukiral.epizy.com/16350365991.pdfIn PDF document text
    • http://xegilejefaga.epizy.com/free_trial_vpn_for_windows.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_off0000de0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0B 5380 bytes
SHA-256: 1c05bc77c4461263a3b0347cdadfedef49b0bf04716064f70fa11b3f30b14a77
font_01_sfnt_off0000f076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF076 10672 bytes
SHA-256: 99971df4318d455fcac6132a684e501e1c08c99beb8a5181b92955e93c49ccda

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