Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba667e5a2247977…

MALICIOUS

PDF

80.9 KB Created: 2021-03-05 07:41:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9f906d6e1d99fe6dfee32a358d88eef9 SHA-1: 548289db02446b688ad0677a55e210a6be4a0298 SHA-256: fba667e5a2247977f0dd9b7ff497001476fe8b873ba05f16c304bf833c4cc904
244 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a redirector link and a large link farm. The presence of numerous external links, one of which points to a known malicious redirector, indicates an attempt to lure users to malicious websites. The ML classifier and ClamAV also strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=ti-nspire+cx+cas+2020 In PDF document text
    • http://svarka-aurora.online/bubble_wings_mod_apk_unlimited_moneym777y.pdfIn PDF document text
    • http://recepty-dd.info/vuwuxiguxunosaruzawejuv2cly.pdfIn PDF document text
    • https://kizevopizimi.weebly.com/uploads/1/3/5/3/135351298/661451.pdfIn PDF document text
    • https://pixadodo.weebly.com/uploads/1/3/2/7/132740612/kemuge.pdfIn PDF document text
    • https://juxilejaguzu.weebly.com/uploads/1/3/4/4/134404551/sesotisovupo_suvugo_pikuwi_xuvefiwivepas.pdfIn PDF document text
    • http://design-kvartira.info/how_many_calories_are_in_1_taco_bell_cheese_quesadillaaihd7.pdfIn PDF document text
    • http://8bitbeardsco.com/lixixadovurqzop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e7532872-e53b-4e41-9525-d5eebec4bd15/this_is_water_speech_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d63820a4-5762-4f79-9e6c-84d7e6bcea10/obama_free_healthcare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aaefb5b-214a-4947-a746-458eddff838c/yard_machine_lawn_mower_blade_adapter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c66d335-d4c7-4ec3-b24b-62f89a3287f7/stand_by_me_song_lyrics_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/460c2486-f1de-4f4d-844f-1c24c67e7feb/special_relativity_postulates_explained.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecfe2d3b-2b51-4f97-a71d-6cb1da9e8717/famubirapavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61339b29-3b26-4e07-bd04-e097d349cd68/1685334887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45f422a3-7976-4d84-9b40-5cd6338b693d/harley_davidson_fatboy_service_cost_in_india.pdfIn PDF document text
    • http://xusijaxux.rf.gd/wigev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9bc6fb3-bb02-414a-988f-2d90e182fc11/sesofigasavugu.pdfIn PDF document text
    • http://tobekiginekafo.epizy.com/xapegenabefokagoter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cf7a5d8-b4ad-415d-9ed1-6747d261d2cb/karcher_pressure_washer_hose_reel_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7320f403-e99b-4c26-a748-6a4395253b7c/girlboss_espaol.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF084 4816 bytes
SHA-256: d4bf7862ddf1707a8175303119f2b2ac635ab2fa1cdd8d36721001938920011b
font_01_sfnt_off000100da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DA 11604 bytes
SHA-256: 2a06b4749fb4752da01cb50cb38ec46315776844f0779c1c09d3cf52580c557a
font_02_sfnt_off000126fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FD 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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