Malicious PDF — malware analysis report

Static analysis result for SHA-256 f46374c00e052788…

MALICIOUS

PDF

73.6 KB Created: 2021-06-04 00:21:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0d842d9981650c5250d08770b0c1b9f4 SHA-1: 695f14d6a559530753985b4ee55ec28a14db0287 SHA-256: f46374c00e052788b504c91d41bdf271f8d0a118d5adcccde436c4a4fed08bcd
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a large number of external links, many hosted on disposable domains like weebly.com, suggesting a link farm or SEO manipulation tactic. The embedded URLs and the nature of the links point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/123?utm_term=realisasi+apbn+2014+pdf PDF link annotation
    • https://sozufozixukuba.weebly.com/uploads/1/3/4/7/134730132/3168168.pdfIn PDF document text
    • https://vodunifowabot.weebly.com/uploads/1/3/5/9/135992931/zuvaf.pdfIn PDF document text
    • https://sixagezox.weebly.com/uploads/1/3/1/6/131606695/9296668.pdfIn PDF document text
    • https://pefoduzipim.weebly.com/uploads/1/3/4/3/134371740/30f935f.pdfIn PDF document text
    • https://nuzopilubejam.weebly.com/uploads/1/3/4/4/134459065/d7653c.pdfIn PDF document text
    • https://pexigupor.weebly.com/uploads/1/3/4/9/134901766/258e9f3404.pdfIn PDF document text
    • https://kobuzefejara.weebly.com/uploads/1/3/1/4/131437799/4685222.pdfIn PDF document text
    • https://goneduxif.weebly.com/uploads/1/3/0/9/130969586/3214238.pdfIn PDF document text
    • https://gusemotasejodab.weebly.com/uploads/1/3/2/7/132741535/3574912.pdfIn PDF document text
    • https://siraxaroxaran.weebly.com/uploads/1/3/1/4/131483069/pazumo.pdfIn PDF document text
    • https://jifemeput.weebly.com/uploads/1/3/4/3/134398411/c98e1df130bbb.pdfIn PDF document text
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/tiduwigupata_mabun_gugenetuduv_nufumefo.pdfIn PDF document text
    • https://rorusipisaj.weebly.com/uploads/1/3/4/4/134496518/1574380.pdfIn PDF document text
    • https://kesegupopu.weebly.com/uploads/1/3/4/1/134131766/1533315.pdfIn PDF document text
    • https://mirulunus.weebly.com/uploads/1/3/1/1/131164386/3c1ba313.pdfIn PDF document text
    • https://xixutusolorul.weebly.com/uploads/1/3/4/6/134685478/koluwumijejevim.pdfIn PDF document text
    • https://napajudiweji.weebly.com/uploads/1/3/4/3/134316113/c17671dc838.pdfIn PDF document text
    • https://dapapakutuluj.weebly.com/uploads/1/3/1/3/131384169/78453.pdfIn PDF document text
    • https://bizuzekibokosu.weebly.com/uploads/1/3/4/4/134446479/ropewos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://watusuxipidu.pbworks.com/f/abstract_noun_worksheets_for_class_3_with_answers.pdfIn PDF document text
    • http://larabefejaji.pbworks.com/f/good_diet_to_lose_body_fat_and_gain_muscle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d50276c-bb4e-45e5-aa6d-7b0ace2a6c8c/i30_tws_airpods_manual.pdfIn PDF document text
    • http://fixulirulafa.pbworks.com/w/file/fetch/144515811/deconstruction_fashion_trend.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cce9cf3d-9bb4-4f20-b22d-43d70ea4a0b1/surface_area_of_composite_figures_practice_worksheet.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_off0000e384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE384 5500 bytes
SHA-256: 955ca59b22699379126ec4d52b2c990d6195d99834c4642131df7acd57ead68d
font_01_sfnt_off0000f654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF654 10200 bytes
SHA-256: d1a98a9877add311210da0cf86de4de91102d07cc34faf63affaab20ef1e1843