Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a5e16f4bc3f70d6…

MALICIOUS

PDF

76.4 KB Created: 2021-03-12 11:33:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e6c4f84e059cc58ad591af3aa72e35a8 SHA-1: 7ae9fad2014d309486fc2f82e493cdb39b69cc76 SHA-256: 3a5e16f4bc3f70d6eb6baacfa7eeb7c937c9c9e6e054a95230d907a22ef2492c
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains text related to 'Contaminacion atmosferica en mexico pdf' and application details, likely a lure to disguise the malicious intent of directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://ponafet.ru/123?utm_term=contaminacion+atmosferica+en+mexico+pdf PDF link annotation
    • https://nudopimiga.weebly.com/uploads/1/3/1/0/131070212/6587550.pdfIn PDF document text
    • https://lokugejepotag.weebly.com/uploads/1/3/4/3/134318746/rurulirelewituxukum.pdfIn PDF document text
    • http://zijixiteluwek.scienceontheweb.net/my_fathers_dragon_movie_in_english.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459482/normal_5ff06a508d9d5.pdfIn PDF document text
    • http://tunabamilusi.mypressonline.com/camping_packing_list_family.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498678/normal_604acfb1330c4.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/74021148775.pdfIn PDF document text
    • http://lebepufu.mypressonline.com/24384126766.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421058/normal_5fe5a05d8d9b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453556/normal_600b009fd9849.pdfIn PDF document text
    • http://mamefumiwuto.mywebcommunity.org/judajazido.pdfIn PDF document text
    • http://gakawisogafuga.mygamesonline.org/maslach_burnout_inventory_scoring_key.pdfIn PDF document text
    • http://vawurabel.mygamesonline.org/what_is_one_of_the_six_fundamental_elements_that_are_found_in_living_organisms.pdfIn PDF document text
    • http://meroxisawifagu.mygamesonline.org/getovokemus.pdfIn PDF document text
    • http://dirozigumifew.scienceontheweb.net/61881821092.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480755/normal_5fc85a398d712.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/jemazejodep/cartoon_photo_editor_apk_pro.pdfIn PDF document text
    • http://kikanelomer.onlinewebshop.net/bafopexurek.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/legends_never_die_viola_sheet_music.pdfIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_45e72d69c25e4b7f9b1cd9198dac5353.pdf?index=trueIn PDF document text
    • https://b133b025-67d1-4190-9e53-fbb99503dec2.filesusr.com/ugd/caf13f_0273896ebc494d5d88557b34ab5223bb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/likerajatob/fikokeduburoseludefe.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_off0000ebd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD9 5244 bytes
SHA-256: 7037c862d5a8de9f204d2a6700889b5cc95beeac72188b0be39c9ee606304aaf
font_01_sfnt_off0000fd98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD98 11404 bytes
SHA-256: 3a186a132dff70ec7da912f62bdb5c2f7723df54eee0e192e8475b7d05142eea

Open this report in the interactive analyzer, or submit your own file for analysis.