Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ea25ebfb0ed68d…

MALICIOUS

PDF

78.8 KB Created: 2021-05-30 02:35:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 050ca7a7e0f9401e935258ec50a5e45e SHA-1: 929516a969ab3bf694621f3b32ca4a40a58f4edd SHA-256: 48ea25ebfb0ed68d75151de2f4faec62eb03c3930fae358caa18672103fa7ab2
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 pointing to disposable hosting, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers also flagged this PDF as malicious, with one heuristic specifically identifying it as a phishing trojan. The presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://lozipotod.ru/strik?utm_term=does+dream+tv+still+work PDF link annotation
    • https://fegajasun.weebly.com/uploads/1/3/4/5/134502742/7505254.pdfIn PDF document text
    • https://nulupuro.weebly.com/uploads/1/3/4/5/134596779/wotin_fekif_lipoburima.pdfIn PDF document text
    • https://pivikupawo.weebly.com/uploads/1/3/4/3/134356995/towovawuken.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420245/normal_6062c520e47c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382627/normal_6023cb08df334.pdfIn PDF document text
    • https://fujubonutebi.weebly.com/uploads/1/3/4/2/134266124/jelutifimej_joxilufozemiv.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4389352/normal_60b2ba2c8e913.pdfIn PDF document text
    • https://lemidedimiba.weebly.com/uploads/1/3/0/8/130874299/2665401.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391611/normal_6046d464a434d.pdfIn PDF document text
    • https://mugunerer.weebly.com/uploads/1/3/4/4/134479547/f1169.pdfIn PDF document text
    • https://girosiwubu.weebly.com/uploads/1/3/0/7/130740458/9ffe6b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/49b43903-44e3-43d7-9664-39cfc400d9f1/komumusivepeme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/368e2c53-fb6b-4285-9622-ee9c5e093250/how_to_break_down_a_bersa_380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13b36998-4948-4969-a986-455ee540013d/is_defending_jacob_guilty.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d24417fe-b472-4672-8c53-3ebd602f41df/windows_batch_programming_variables.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d6f4ee4-9f44-4579-9f78-82054b5ee12d/jodelugavewutewuvikeka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e4d9296-3fc6-4a56-a59e-f58445bb6615/84638750204.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/328cef73-940c-43d5-9bb3-4f0a2c0d7f5a/kofaraxofoxusok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3218e95a-8a5b-4cd3-a282-acdb08abb27c/orbital_motion_worksheet_4_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/586a7834-af65-465a-897e-f21a431f297a/3349857601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a54513fa-6e08-4968-9f5a-3bd37d9eb7d3/bexijugil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30f97cf9-cf87-4673-ae9a-f41ff7b4b4be/97750357529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed1a9fde-91d1-47e2-9857-ae35eab0aa0c/57133869032.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_off0000f6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F0 5184 bytes
SHA-256: 2482fe1450d556b25b7028a2de3d2fb4576ad04b6f437d2b3036ff2bf92d0ca6
font_01_sfnt_off00010897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10897 10864 bytes
SHA-256: d6582640f7be8eca54f358734579a3e451ce4f6992bb5bc10398edc793d83ca3