Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc46f7b6eea7f553…

MALICIOUS

PDF

74.3 KB Created: 2021-03-07 15:08:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0ce58fdbd0fd445c044d5324ea69c694 SHA-1: 052af4246dce6165f2c11d197741f05e621812d0 SHA-256: cc46f7b6eea7f55314ce1a67313725547ee76f65c5b9804d58501c564a0cc0c1
186 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable or low-reputation domains, indicating a link farm or SEO spam strategy. One of the primary external URIs points to a suspicious URL, likely intended to lure users into clicking through.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/award?keyword=garmin+nuvi+2639lmt PDF link annotation
    • https://noduxulab.weebly.com/uploads/1/3/4/9/134901810/kazozedujo.pdfIn PDF document text
    • http://lajulufubugo.22web.org/poulan_pro_42cc_chainsaw_replacement_parts.pdfIn PDF document text
    • https://zutijuxugovoxi.weebly.com/uploads/1/3/4/6/134684331/koferumir.pdfIn PDF document text
    • http://sedisifoxe.22web.org/nimemiwivu.pdfIn PDF document text
    • http://juvovagesubo.mywebcommunity.org/waring_food_dehydrator_model_11df21_manual.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/taxasurunebirinetofiz.pdfIn PDF document text
    • http://raisinsapp.club/how_to_use_ham_radio_without_a_licenseczacw.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/31551982317.pdfIn PDF document text
    • https://funopazotasar.weebly.com/uploads/1/3/1/0/131070342/pupovosotewe_rebulokituwenuz_dinepabus_tedopetolepew.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/vasajaranosun7jmvd.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
    • http://vigopul.epizy.com/68329432421.pdfIn PDF document text
    • https://504706c9-3a86-45eb-876a-6494ef133fff.filesusr.com/ugd/80c1db_6ccfd1609afd4d8785965e924a98e9ad.pdf?index=trueIn PDF document text
    • http://solatilexi.epizy.com/inspection_and_test_plan_excel_template.pdfIn PDF document text
    • http://fafanuzumamowaz.epizy.com/79590665847.pdfIn PDF document text
    • https://5a6df620-610b-4d6f-8f1b-71e936bb70bc.filesusr.com/ugd/1f5cef_8e46467d8c2b438b80184fcce872c547.pdf?index=trueIn PDF document text
    • http://jarawujutuva.epizy.com/zuzuwowerirebe.pdfIn PDF document text
    • http://gupexofuvesok.epizy.com/update_android_box_4._4._2.pdfIn PDF document text
    • https://5d3a3edc-1384-4eb0-a354-174dd54c13aa.filesusr.com/ugd/7f5dc5_a3c1eab1fa7f484fa18760e94a90174a.pdf?index=trueIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_6e4637fbbef0440d951dc05af9e5ed99.pdf?index=trueIn PDF document text
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_2bfa048cef2b41f3a8acbd423a6385c0.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_off0000da58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA58 5004 bytes
SHA-256: e19bf93382bf48ef1e1a115f33c87c770dac976c1112cde6c4305acd4831879a
font_01_sfnt_off0000eb33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB33 10204 bytes
SHA-256: 7302e0ba45a1638db039d0e7efe2d62b5f7163c14ca464bd0d027eea3cae1dbc
font_02_sfnt_off00010e34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E34 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3