Malicious PDF — malware analysis report

Static analysis result for SHA-256 1370f0e9e0bed203…

MALICIOUS

PDF

82.9 KB Created: 2021-03-13 22:26:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0394f0442a8cf8c0b25216fb9ddd9716 SHA-1: 18df4f2efa17fa4706da57d5bf8e833fe255c0c7 SHA-256: 1370f0e9e0bed203f7a99753ef70dfa211ee2dad4c5f636a00bee46ea7c89040
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of an attempt to compromise users.

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://pelibifir.ru/123?utm_term=frankfurt+map+pdf PDF link annotation
    • https://cdn.sqhk.co/ribafesupuro/dZL32hg/zen_1010_block_puzzle_game_mod_apk.pdfIn PDF document text
    • https://semuzotefol.weebly.com/uploads/1/3/1/4/131437619/tebenerafubo.pdfIn PDF document text
    • http://manthoughtswebsite.website/17370708836wloxb.pdfIn PDF document text
    • http://instapriz.online/samsung_ubd-k8500_best_pricefdmxq.pdfIn PDF document text
    • http://maleev.online/my_maytag_dishwasher_not_cleaning_wellaut4n.pdfIn PDF document text
    • https://rixajijinuroje.weebly.com/uploads/1/3/4/4/134473879/zaxajopato-xuxusaxab.pdfIn PDF document text
    • https://texifafotolatip.weebly.com/uploads/1/3/4/7/134764930/9825aa3dbcb204.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/Ajbggii/crimson_company_the_duelling_card_games.pdfIn PDF document text
    • http://blacklaser.ru/par_quoi_remplacer_la_creme_liquide_dans_une_saucezaxob.pdfIn PDF document text
    • https://cdn.sqhk.co/poxudanefisi/ggid4jd/free_credit_report_from_transunion_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/dodipenameki/Aheb6yO/word_link_to_previous_header_not_working.pdfIn PDF document text
    • https://fuwefojogimoro.weebly.com/uploads/1/3/4/3/134339806/6b55554a45f.pdfIn PDF document text
    • https://cdn.sqhk.co/doxinotilid/idACUWM/yeezy_700_mnvn_orange.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/fhe3TPi/nitekusadizox.pdfIn PDF document text
    • http://flylovel.com/sample_of_construction_safety_and_health_program_in_the_philippinesjocfr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sokevixufumuluv.rf.gd/57105330763.pdfIn PDF document text
    • http://tomoguwotikumux.rf.gd/what_is_a_good_swim_time_for_half_ironman.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_off000105a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A1 4996 bytes
SHA-256: 24c332307f11768241d5b7265139db0ad1cd10fb1cb625c792b99c5f50b0783e
font_01_sfnt_off00011691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11691 12040 bytes
SHA-256: f162fc5106bb1adefba6b75598d2948b31ff564e3eaeda2a8e21f5d0957eebaa

Open this report in the interactive analyzer, or submit your own file for analysis.