Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef311c964a4d51e…

MALICIOUS

PDF

75.0 KB Created: 2021-03-10 02:23:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 97a242455cf4628dc8a73c4e8b66cea8 SHA-1: 705726e76b98e8ff45c9610d2c1820543c11e6a3 SHA-256: 5ef311c964a4d51eb791b3afb891105e56d67d1a3d9ace07fd2968a960cf27f7
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many of which are SEO-themed, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The primary malicious URL identified is lozipotod.ru, which is likely used to host or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/strik?utm_term=how+to+maintain+a+summer+house PDF link annotation
    • http://meetsucre.pro/is_the_4.6_ford_engine_v8_a_good_enginezpu9a.pdfIn PDF document text
    • https://bojufare.weebly.com/uploads/1/3/1/0/131070992/1e5578fbc0b8d.pdfIn PDF document text
    • http://wupevijijoze.mygamesonline.org/fediwadiwofogezabejomenap.pdfIn PDF document text
    • http://buybritishcat.com/vagoderabudikotogaketezsvxc.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/do_solar_watches_need_battery_change.pdfIn PDF document text
    • http://beremoter.online/galaxy_a10e_screen_repair_costszigx.pdfIn PDF document text
    • https://liloxowilobo.weebly.com/uploads/1/3/4/2/134265539/deecf050aae5.pdfIn PDF document text
    • https://paxituzupinemof.weebly.com/uploads/1/3/5/3/135303349/8f6f5a.pdfIn PDF document text
    • http://lorebip.22web.org/callaway_big_bertha_hybrid_2019_adjustment_guide.pdfIn PDF document text
    • https://fukajupiboxa.weebly.com/uploads/1/3/5/9/135973929/genuzozo-didirumolalu-suruwijaket-zamutesiwufux.pdfIn PDF document text
    • http://tosety.xyz/crane_drop_humidifier_instructions39p58.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/tupofelasujewas/can_you_get_cosmetic_surgery_if_you_have_high_blood_pressure.pdfIn PDF document text
    • http://subogerilazelo.atwebpages.com/97224997169.pdfIn PDF document text
    • http://jigezadoxari.epizy.com/on_the_road_again_chords_bob_seger.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/bonart_electrosurgery_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/what_does_a_health_psychologist_do_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/bedonijimuniri.pdfIn PDF document text
    • http://bujijawuta.atwebpages.com/zotero_literature_review.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/atmosfera_capas_que_la_forman.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/how_do_you_charge_a_ego_t_vape_pen.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_off0000eae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE9 4948 bytes
SHA-256: 8f3ab27f3772251f968b6b8f13b8231cf21b20173ece97ec72ace70d4d7be9e5
font_01_sfnt_off0000fb9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9B 10080 bytes
SHA-256: df4c16a7f79da41432df380495600ac7933161618b9b5fc915bece86f593321c

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