Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dfae70e945ed520…

MALICIOUS

PDF

79.5 KB Created: 2021-05-16 19:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ba73fccc57c3e897a7020b032eee0e45 SHA-1: b3738f6a8c7c705fd4bed9510b907f10e3032e6a SHA-256: 6dfae70e945ed52056c5ffcfe295977a20aaaaf16ab1a722664c0f10dbacebee
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('soxebez.ru') that is likely used for phishing or malware distribution. The PDF structure and embedded content suggest it's part of a link farm designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/strik?utm_term=cuales+son+los+verbos+irregulares+en+ingles+ejemplos PDF link annotation
    • http://kiluzilaw.sportsontheweb.net/aruba_map_download.pdfIn PDF document text
    • http://lofoporubatul.mygamesonline.org/27294916857.pdfIn PDF document text
    • http://pafowitowa.medianewsonline.com/marasmus_treatment.pdfIn PDF document text
    • http://luwinilulurop.mywebcommunity.org/toro_824_snowblower_manual.pdfIn PDF document text
    • http://dabosesavedevet.medianewsonline.com/delonghi_2300w_ceramic_panel_heater_review.pdfIn PDF document text
    • http://wulutano.mywebcommunity.org/jurnal_tentang_bahaya_narkoba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f7b9230-7281-4583-93b8-47ba2b017c9b/26581444365.pdfIn PDF document text
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_97715b7566f949c79806c2714097cdc9.pdf?index=trueIn PDF document text
    • https://441768bb-9839-4df4-8f78-dd1233b527f6.filesusr.com/ugd/7e6080_163233f6186143228d3b908b2f5112a3.pdf?index=trueIn PDF document text
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_59fb110fbbe240ac98475abe631fae76.pdf?index=trueIn PDF document text
    • https://183df7f2-4185-4ca0-bfcc-33b39bc842f1.filesusr.com/ugd/9ac34a_b8b017568b024e1f8829bf4dba14f5b4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gavobawum/platformio_stm32_hal.pdfIn PDF document text
    • http://befugoj.epizy.com/blood_type_o_positive_diet.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/star_wars_ahsoka_show_trailer.pdfIn PDF document text
    • https://275320ff-96dd-455a-9699-a0fdc58b27a5.filesusr.com/ugd/943725_8f37db3242664bd58793824368f295da.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/majestic_gas_fireplace_insert_models.pdfIn PDF document text
    • http://bepolujogox.atwebpages.com/psychoanalysis_criticism_in_literature.pdfIn PDF document text
    • http://tidewoxawutose.epizy.com/berio_folk_songs.pdfIn PDF document text
    • http://divojeniro.epizy.com/sheet_metal_cutter_machine_harbor_freight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/549a9871-661e-48fa-b6c9-881672c041be/snowbear_utility_trailer_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/wawepufunuzelosuwi.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_off0000f592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF592 5320 bytes
SHA-256: 86757aaf16c0f92a0aef304ab13665b8b59bb5a79559f8c4693d263d6bc82977
font_01_sfnt_off0001079d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079D 11936 bytes
SHA-256: 5d9ef50fcd72734d7b1445dfe43fd5962befcad669f0c9a7c1fdffe6b23c3ab3

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