Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3de2636465294cc…

MALICIOUS

PDF

69.1 KB Created: 2021-03-18 23:00:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 629884a74e83846d0b3a81a95280ad2e SHA-1: 4b2c502eca9ad457b087a0aa635dc6983134aa2a SHA-256: e3de2636465294cc21cf1ff9a7e6f15a8ea2070c2b4f2086eec2d32f71ca8268
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 hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML heuristics confirm its malicious nature, flagging it as a phishing trojan. The presence of embedded URLs and the structure suggest an attempt to redirect users to potentially malicious content.

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://druttle.ru/wix?keyword=glencoe+earth+science+answer+key PDF link annotation
    • https://tokemenar.weebly.com/uploads/1/3/4/3/134337898/xozonew_bogakakoleworo.pdfIn PDF document text
    • https://bopilopuneliniw.weebly.com/uploads/1/3/5/3/135304065/nixigifubo.pdfIn PDF document text
    • http://votinegabes.iblogger.org/wurunalerujubeso.pdfIn PDF document text
    • https://radixukawatezod.weebly.com/uploads/1/3/4/6/134645496/noxazola-xozegi-medomasapuvewi-riwuvun.pdfIn PDF document text
    • http://xekuluw.iblogger.org/what_is_the_moral_of_the_cyclops.pdfIn PDF document text
    • http://moderivapotilos.22web.org/a_practical_english_grammar_exercises_download.pdfIn PDF document text
    • http://gakivako.iblogger.org/fazaralatomu.pdfIn PDF document text
    • https://gubilipolijig.weebly.com/uploads/1/3/4/7/134707964/9415209.pdfIn PDF document text
    • http://babudategajuzul.iblogger.org/guidepoint_salary_associate.pdfIn PDF document text
    • https://gubepukabo.weebly.com/uploads/1/3/0/8/130873841/lubabezilekobewivuv.pdfIn PDF document text
    • https://muvozipiga.weebly.com/uploads/1/3/5/3/135391344/fofudutukejunawat.pdfIn PDF document text
    • http://xudogiborijum.66ghz.com/hewlett_packard_8600_printer_manual.pdfIn PDF document text
    • https://woxoxoba.weebly.com/uploads/1/3/4/8/134893248/5860577.pdfIn PDF document text
    • https://nazolaruwesibag.weebly.com/uploads/1/3/1/4/131453197/4684822.pdfIn PDF document text
    • http://vivofuma.66ghz.com/aila_re_aila_dj_song_pagalworld.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zosotafofuzidiv.rf.gd/libro_los_nombres_de_dios.pdfIn PDF document text
    • http://samarusoreris.epizy.com/liledofegusaxi.pdfIn PDF document text
    • http://sevetise.rf.gd/94462076617.pdfIn PDF document text
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_87b3bdaf78e24aa9b7058d7ec92d594f.pdf?index=trueIn PDF document text
    • http://lomuripejo.epizy.com/gotokoluzif.pdfIn PDF document text
    • http://veziledijiv.rf.gd/amoeba_sisters_dna_replication_video_recap_answers.pdfIn PDF document text
    • https://fb7bf4c5-056f-4058-a7d1-073478569b53.filesusr.com/ugd/d90490_0e7c4f590af84b349df693e9bf34b3e8.pdf?index=trueIn PDF document text
    • http://fivajopafovile.rf.gd/anari_song_video.pdfIn PDF document text
    • http://kazixovo.rf.gd/asbestos_removal_guidelines_nsw.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_off0000ce91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE91 5176 bytes
SHA-256: fe27a683a7086cac38aa1a692433e0449c99986d72d991d6780ad1887aa44505
font_01_sfnt_off0000e03e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03E 10708 bytes
SHA-256: 8f3cdc4369599854a9b8ccc9a5f51b3c6be2c3df73356f0f2d71ef2e7814ed39