Malicious PDF — malware analysis report

Static analysis result for SHA-256 83a6eaf69eb585b5…

MALICIOUS

PDF

70.0 KB Created: 2021-02-11 22:39:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4f4c5c454cfd6ca9ccc496e04015b016 SHA-1: 717f6d040b9143d73bddf21012d4020315e926e1 SHA-256: 83a6eaf69eb585b5aeaf959b165943aab568dc38e492fd19fcb75fec67f10c7a
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=introduction+to+logic+answer+key PDF link annotation
    • https://xozilozevaloda.weebly.com/uploads/1/3/5/3/135391373/duxadoj-bukisoxadegida-tixok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391621/normal_5ffd0a0d71be5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497071/normal_6009ae85a22ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385848/normal_600b43c483deb.pdfIn PDF document text
    • http://bigwin-1xbet.fun/care_home_operations_manager_job_descriptionlym59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452381/normal_5fd16f8e8f0f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404727/normal_5fe5d4a23d913.pdfIn PDF document text
    • https://nasabera.weebly.com/uploads/1/3/4/4/134447265/4b16bc01968ea0.pdfIn PDF document text
    • http://best-store.club/eclipse_oxygen_64_bit_portabletcfhg.pdfIn PDF document text
    • http://trellos.fun/95841221763s84vs.pdfIn PDF document text
    • https://bunosepe.weebly.com/uploads/1/3/1/3/131379858/vudimafeluri.pdfIn PDF document text
    • http://shishkin-seed.xyz/rumble_in_the_jungle_pairing_crosswordvu66c.pdfIn PDF document text
    • https://sazomoravevak.weebly.com/uploads/1/3/0/9/130969829/lobesefotida_retugiposiwoxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490123/normal_5ff714d9d532a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376103/normal_5ff65c6519299.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386836/normal_6021701cba9d1.pdfIn PDF document text
    • http://help-verification.com/140266074862amo0.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/dadupawo/gesalikaw.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_off0000d5c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C4 5304 bytes
SHA-256: a229709b23d13b24fc4c1c0752f3b89e33d953857915de5e516132e9e639a01a
font_01_sfnt_off0000e7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F2 10088 bytes
SHA-256: 47c623e7d08ef1ac5614f50b727f411da8e8a9d4b39c318b16b9f369fc234f8c