Malicious PDF — malware analysis report

Static analysis result for SHA-256 dda086c056806a42…

MALICIOUS

PDF

85.6 KB Created: 2021-03-29 23:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: bb92d5ca82d503108d9249bd99dc2676 SHA-1: 9eca8c34694db4a9fe58f640eba376c4fa7b6ada SHA-256: dda086c056806a4261140c53b3e58cf0e56ed15429839e9d6226a7fbdebb762e
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of malicious activity, potentially leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jacksth.ru/award?keyword=que+es+el+aprendizaje+kinestesico+pdf PDF link annotation
    • http://dezlice.ru/tanodv4zen.pdfIn PDF document text
    • https://fiwozipuwawew.weebly.com/uploads/1/3/0/8/130814157/wipogezen.pdfIn PDF document text
    • https://jazujopu.weebly.com/uploads/1/3/0/8/130873842/eefe3a.pdfIn PDF document text
    • https://cdn.sqhk.co/fonazovep/ek8iegd/download_stickman_warriors_4_online_mod_apk_terbaru.pdfIn PDF document text
    • http://shtampshop.ru/90081778027cprp5.pdfIn PDF document text
    • http://kompledom.com/mojivezazezs2egc.pdfIn PDF document text
    • https://zitudoxe.weebly.com/uploads/1/3/1/4/131437236/kulididara-dawewarit-sodum-bosida.pdfIn PDF document text
    • http://world-wild-shop.com/how_do_you_crochet_a_beanie_hat_for_beginnerskcwu1.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/ugejhgc/ps3_bruteforce_save_data_3._8.pdfIn PDF document text
    • https://tijirurilulade.weebly.com/uploads/1/3/4/3/134312421/kesokazafo.pdfIn PDF document text
    • https://xefegirabiveg.weebly.com/uploads/1/3/0/9/130969499/zoliso.pdfIn PDF document text
    • https://cdn.sqhk.co/vitikitema/bgchibx/96743887284.pdfIn PDF document text
    • http://hookup681.site/how_to_get_rid_of_sand_textured_wallskv9be.pdfIn PDF document text
    • https://rapinawenag.weebly.com/uploads/1/3/0/9/130969945/pelopinunakag_regufedug_depepolil.pdfIn PDF document text
    • https://woninulanomawij.weebly.com/uploads/1/3/4/6/134670754/duderiwokonavetipo.pdfIn PDF document text
    • https://cdn.sqhk.co/telazaje/giajihj/gun_games_for_chromebook.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://2c91b947-1dd8-401e-ae91-d595f2f75867.filesusr.com/ugd/0af078_8ad948df7c314e3788957c2921be4236.pdf?index=trueIn PDF document text
    • https://7ef7ebf0-bcb0-4ca2-8538-5a19c3e9f01c.filesusr.com/ugd/aff7ca_b25045b4d8e74f09863d7f3ad4f60291.pdf?index=trueIn PDF document text
    • https://a0d2adcf-75bd-42a9-a42a-c23e1c6e9e1a.filesusr.com/ugd/85c99c_867bfc5212754445938531a0a10a60f0.pdf?index=trueIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_7b0c0726e3ef41d899dd3b7659808947.pdf?index=trueIn PDF document text
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_b90b7824155f4f30b1f62a56f1ab5e24.pdf?index=trueIn PDF document text
    • https://94e55d9a-ad7c-4b6b-a54a-a00202ad3087.filesusr.com/ugd/208fd7_7810b95c7d604ec0aca86df0d4fa8bc8.pdf?index=trueIn PDF document text
    • https://689a2394-1721-4ce0-b6f7-af9f1dc0d621.filesusr.com/ugd/0f5b72_498f0583e00b4370bd8497d0bfbff4dd.pdf?index=trueIn PDF document text
    • https://22520ec4-2132-45a5-98b8-54db1b71d3ea.filesusr.com/ugd/b33b96_4604115617424d77b1e45400690c5016.pdf?index=trueIn 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_off0000fe97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE97 5284 bytes
SHA-256: b89b4c7fdca51d2dd12f60c60c4b66608ac02ce0ea06c048f754e227e5fc1307
font_01_sfnt_off000110a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A9 12376 bytes
SHA-256: 4cbf87f62c42735a783412540f1ff7a371a86e9806611ecbf00f6189cb746a35
font_02_sfnt_off00013897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13897 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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