Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d4b12b2c45ef321…

MALICIOUS

PDF

76.1 KB Created: 2021-05-17 20:40:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c0b32a37a69df543b1356052129bfb71 SHA-1: c98fad954d4915941f44f2fc5b8a2b516a769331 SHA-256: 0d4b12b2c45ef3219d3681aa4045b82d015104383f5af384f285d8df2c79f280
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to SEO-optimized PDF documents, suggesting a link farm or content-scraping operation. One prominent URL, https://kuzutuzo.ru/strik?utm_term=fresher+mechanical+engineering+jobs+in+oil+and+gas+industry, is likely intended to lure users to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://kuzutuzo.ru/strik?utm_term=fresher+mechanical+engineering+jobs+in+oil+and+gas+industry PDF link annotation
    • https://ponegibafuzixi.weebly.com/uploads/1/3/1/4/131406662/xanuluwez_nemuka_ramubigojik_xozebuneregok.pdfIn PDF document text
    • https://piwitaxoz.weebly.com/uploads/1/3/4/6/134603619/8507691.pdfIn PDF document text
    • https://pokekuxabinupar.weebly.com/uploads/1/3/4/0/134016783/c70dca8.pdfIn PDF document text
    • https://nuropasidax.weebly.com/uploads/1/3/5/3/135393275/7930388b2f63a49.pdfIn PDF document text
    • http://negeduji.66ghz.com/subject_verb_agreement_in_present_tense_worksheets.pdfIn PDF document text
    • https://rokilero.weebly.com/uploads/1/3/4/8/134879734/nuwononasug.pdfIn PDF document text
    • https://manesufepal.weebly.com/uploads/1/3/1/3/131381078/dobik_vabejufetuwuv_bivatug.pdfIn PDF document text
    • http://fogivuwekewelub.iblogger.org/wojibipojevox.pdfIn PDF document text
    • https://sozatoma.weebly.com/uploads/1/3/4/4/134484551/xaxipokegu.pdfIn PDF document text
    • https://fatatovol.weebly.com/uploads/1/3/4/7/134707957/91dce6746d2b.pdfIn PDF document text
    • http://pobigajik.22web.org/how_to_light_a_coleman_evcon_furnace.pdfIn PDF document text
    • https://boxuxalido.weebly.com/uploads/1/3/0/8/130814411/3ffc9b5.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/sedimeraxufi/lexus_rx_350_lease_deals_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/948eca8a-4ed2-4313-89fa-e665fc8870bc/what_to_do_if_your_garbage_disposal_is_stuck.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/why_do_i_have_a_painful_bump_on_my_scalp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b6152be-72cf-4a7a-99c2-238772e9ee38/gomewitujoze.pdfIn PDF document text
    • http://dukutogesedu.epizy.com/kazurokilesogivekerat.pdfIn PDF document text
    • http://tobifovibel.rf.gd/nekupiwebenit.pdfIn PDF document text
    • http://mujigivufutufu.rf.gd/casio_watch_module_no_2747_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/what_is_a_cyberpunk_game.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/hp_cp1215_driver_mac_os.pdfIn PDF document text
    • http://xesovukefezusag.rf.gd/bluedio_t_elf_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/jowisavafavaraxiniganafum.pdfIn PDF document text
    • http://xezabesazigida.epizy.com/how_to_learn_egyptian.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b90f93d9-96df-44ac-96a0-1db2c64f017f/82632364312.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_off0000eba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA1 5628 bytes
SHA-256: bc9aa73fcd720fdca8fbaaa43746cbd11879c354da6b5f6c6dcb93b5e5028acc
font_01_sfnt_off0000fea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA1 10480 bytes
SHA-256: 6e85626ba07ca1fae8e85883a5ee4191fc17f8e3b7148ed97a9116ed27b8ce86