Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7128c32b25529f…

MALICIOUS

PDF

68.7 KB Created: 2020-12-19 14:37:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 67b09bd2749039747d67178ef85f551c SHA-1: 9de088c4bd1387e85610bc9bbaed15d8aed78432 SHA-256: da7128c32b25529ff1217779b39f56a92beda8cefb979214494aac9c665a0543
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting services, indicating a link farm or redirection scheme. The presence of a URL like 'https://trafftec.ru/aws?utm_term=bootloader+win+7' suggests a lure related to system bootloaders. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/aws?utm_term=bootloader+win+7 PDF link annotation
    • https://wizejuxexena.weebly.com/uploads/1/3/4/6/134655833/8127298.pdfIn PDF document text
    • https://gidavazowas.weebly.com/uploads/1/3/4/8/134863559/lekowigizigiku-sufipav.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/8769445.pdfIn PDF document text
    • https://galixasuja.weebly.com/uploads/1/3/4/5/134518214/winesuzazera_nikaroxitufe_gebem_mopaned.pdfIn PDF document text
    • https://lenusasifelodu.weebly.com/uploads/1/3/4/3/134350773/1593428.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/c3169e3b-f0de-4ab5-908f-bf4d27bd2c54/56428277174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4685013b-e6c7-4876-90bf-744c3855a9ff/vufatemizosudububotisawod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c50dd604-6b33-4b34-a9b8-5d25af673daa/la_guerrera_telenovela_capitulos_com.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8412edf-11ce-43de-8ad6-7221be5d7d7e/math_chapter_4_review_test_4th_grade_go_math.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55f378139af037662f8a9/t/5fca2866ee6dcf7e363af2ef/1607084135156/pc_build_simulator_full_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/bouncing_ball_animation_flash.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a4d15b8-037a-440d-acf3-748a9a44e3e5/pilozudakemimulatix.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/70432754019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc361aa8139af03765501cd/t/5fcb7d76a3bc3d19152f34a5/1607171447603/city_block_in_spanish_language.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE70 4864 bytes
SHA-256: ebb687dc5e21ee8484ef1622a41257936dfe581bac479abc73637ad194f2c1d0
font_01_sfnt_off0000df21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF21 12352 bytes
SHA-256: c4d47c845a40c06fd6f40b283ba96f6487fe53f1016deb54d355bc19a4fdbdcc

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