Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d206ce9abfcc9f…

MALICIOUS

PDF

78.3 KB Created: 2021-03-08 05:02:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7dba535bc63d384b334c4a1a09d007b5 SHA-1: 03b5fc96ec128adf24f98fe408787a79aba95ca1 SHA-256: d3d206ce9abfcc9f15756d96fa9c84c67a8ffbf08b6baed61ed2b5a29201e191
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous external URIs that direct users to various websites, likely for SEO manipulation or to host malicious content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/wb?keyword=how%20long%20for%20sat%20with%20essay PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453563/normal_5fdce99b660ec.pdfIn PDF document text
    • https://melezejezoman.weebly.com/uploads/1/3/5/3/135383670/pisipup-gorudetukuzepam-nimojepesus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452863/normal_6033c5cd21384.pdfIn PDF document text
    • https://pamedokoso.weebly.com/uploads/1/3/4/6/134674676/4de0687d0c23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497650/normal_5fe6400c1ddf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387817/normal_5fd2ad086a503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391305/normal_5fd989cbb8b50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407102/normal_601e73c2b84dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367648/normal_5fe547e18ff1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482402/normal_601f775904831.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372074/normal_5ff435ecdb394.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444369/normal_60116dcf5dc86.pdfIn PDF document text
    • http://aycotoro5.xyz/how_to_go_before_the_courts_of_heavenpoifs.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/cch_bn_cu_th_trong_fifa_mobile8vg2l.pdfIn PDF document text
    • https://karaxofuko.weebly.com/uploads/1/3/5/3/135344752/6418059.pdfIn PDF document text
    • https://sovopedu.weebly.com/uploads/1/3/5/3/135301682/5814596.pdfIn PDF document text
    • https://tekovidekugowi.weebly.com/uploads/1/3/5/3/135315876/lideziroxe-buvezupigeneno.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/lovomijelun/patterns_of_world_history_volume_1_to_1600.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/happy_chinese_new_year_word_search_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/call_of_cthulhu_rulebook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/49936017077.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_off0000f425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF425 5184 bytes
SHA-256: 1a6987149f2055f2cf78d314ab535bb99edc741a25d685be09f3d0ae59a0eb02
font_01_sfnt_off000105e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E2 11488 bytes
SHA-256: 759506a44c603e732ee10f03bf91e1dd62655a69c1fd6f1c732028bc9a3a1e1e

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