Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c77c46358ab485b…

MALICIOUS

PDF

82.0 KB Created: 2021-04-04 03:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f4a8a6c742df29bf444efa397588fac5 SHA-1: 0051dcda4fe100c60cc955c39912bfe6f110768f SHA-256: 1c77c46358ab485b9862c61eaf0b27da26363d6da5e944e4108fdc81a29443b1
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to disposable hosting and are designed to appear as SEO content. The primary malicious URL identified is 'https://seumenha.ru/wix?keyword=carx+drift+racing+hack+ios+jailbreak', suggesting a phishing or malware distribution lure. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan-like behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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 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://seumenha.ru/wix?keyword=carx+drift+racing+hack+ios+jailbreak PDF link annotation
    • http://strapslap.online/seven_deadly_sins_grand_cross_tier_list_maker3en1h.pdfIn PDF document text
    • http://zopedefijewe.iblogger.org/adobe_after_effects_cs4_tutorial_for_beginners.pdfIn PDF document text
    • http://copytoshka.ru/79250068505i0t7b.pdfIn PDF document text
    • http://o-karte-kopilka.com/fabezoq2mgw.pdfIn PDF document text
    • http://xuriretijidaja.22web.org/jakujerorepifebivuwuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://sisuraregimu.rf.gd/ios_13_beta_8_ipsw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1550f9f8-a9e6-4832-8763-6cb219a30ab8/sinopakitasepata.pdfIn PDF document text
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_fe98701503d248a6bfcc57e8aac2fb5f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e67f1ced-c32d-4dba-9679-4661a5f6d2ef/how_do_you_know_if_it_is_an_ionic_or_molecular_compound.pdfIn PDF document text
    • http://gupubagixigopi.epizy.com/amoeba_sisters_video_recap_pedigrees_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9f3f97e-52c7-4265-ad04-733b9ee3da8d/bram_stokers_dracula_film_vs_novel.pdfIn PDF document text
    • http://mowelafawugek.epizy.com/best_travel_guide_book_new_york.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/524d9118-9a04-4d30-82c7-afc10755481e/ideal_team_player_book_quotes.pdfIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_0faf9ac007e84c97b92c722666936e3e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5279e61-b690-490f-b690-e97da75122c3/how_do_i_fix_the_led_light_on_my_whirlpool_refrigerator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/016dba3a-3062-4caa-b6ab-599f97c5a363/baby_groot_planter_kit_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb43e7dc-2ddf-4ad1-abe3-b21fb8547177/luwobemimixok.pdfIn PDF document text
    • https://ac09d6fb-20d1-47e2-97cb-2568fc137cdf.filesusr.com/ugd/03dcd4_3b3569b124ae434488369fba9bc387ea.pdf?index=trueIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_92f922d1bab84b69ad14f1ae125aea29.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d3e8b7f-f74a-45f9-b4af-e82dbfa2734b/dajevajugej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5afcb6a7-155d-493f-b42f-83428d489e29/gejavoreponaroli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/571ea4f9-63f9-4e85-a536-29ec99878c44/metro_rail_and_busway_map_los_angeles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d470505-e457-49af-9386-e203edda0d5b/kuzatuwuguz.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD65 2960 bytes
SHA-256: 495dc75d95a6a6f45ac0640accda880cdd7226211fb355277ff836c691f61857
font_01_sfnt_off0000e7d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D3 5536 bytes
SHA-256: dce0f0dbe747b1b85093f882ae09509484ba28fe72eb672ed6d527ca39488751
font_02_sfnt_off0000fa9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9E 8232 bytes
SHA-256: ed9715607a8a5081f8276a2c45fe85b3fddc9ac473e3704db9d0c424d484cc0b
font_03_sfnt_off0001118d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118D 11440 bytes
SHA-256: f453a97a5d3af8bf0d822a76ba767a609600dd14084e88dd26b33c07928801ff