Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8225866d9a5f26e…

MALICIOUS

PDF

74.5 KB Created: 2021-03-06 02:39:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6d6546df472f59fa00765d1a36f01754 SHA-1: 93d5655bf22600526b6c9ea149d1f0eba7d4cca9 SHA-256: e8225866d9a5f26e73dc19a8aaee1c028ae2644481d8fb69196385da8b287b40
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, containing a large number of embedded links. Several of these links point to known malicious redirectors or disposable hosting, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains terms related to recalls and technical manuals, likely intended as lures.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=dometic+awning+motor+recall In PDF document text
    • https://cdn.sqhk.co/vimewiki/iKrja7N/screen_recorder_pro_apk_root.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426830/normal_5fcd6be2abb08.pdfIn PDF document text
    • https://cdn.sqhk.co/videmixolute/MXGnTgc/26743528857.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/9jbhgj3/airport_city_online_hack_tool.pdfIn PDF document text
    • https://buvikibera.weebly.com/uploads/1/3/1/4/131453013/2752027.pdfIn PDF document text
    • https://cdn.sqhk.co/mapuvokunoj/8jatHig/dungeon_crusher_siege.pdfIn PDF document text
    • https://dujisiseruw.weebly.com/uploads/1/3/0/7/130776106/lelenetagil-fomubomi.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/QihXLXp/oklahoma_state_football_coach_rant.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_604194c63e259.pdfIn PDF document text
    • https://rigukolanerimi.weebly.com/uploads/1/3/4/5/134519373/wudovetifozavap_mubetu.pdfIn PDF document text
    • https://fejisamuzek.weebly.com/uploads/1/3/4/6/134636520/tovir.pdfIn PDF document text
    • https://mofutobanu.weebly.com/uploads/1/3/1/3/131383854/fuwenaxage.pdfIn PDF document text
    • https://tuvaxijilitug.weebly.com/uploads/1/3/4/6/134668501/xiluluxijotip.pdfIn PDF document text
    • http://lisipezasuk.iblogger.org/55106493778.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379222/normal_600392ea47bcc.pdfIn PDF document text
    • https://ladolijid.weebly.com/uploads/1/3/2/8/132816107/lagibipotuv-madomaredefof-lepojefedizij-dejafebabona.pdfIn PDF document text
    • https://donarebam.weebly.com/uploads/1/3/1/4/131453010/4700295.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/77a33b5f-7f56-4cdf-aae0-6b0b793ea54c/mitsubishi_mini_split_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/570c7bb2-6ebe-4a5b-bf9e-c3f3f5ded941/define_evolutionary_theory_in_government.pdfIn PDF document text
    • http://wedutatitupaze.epizy.com/21604701095.pdfIn PDF document text
    • http://fikexole.rf.gd/92117807166.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_off0000e757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE757 5032 bytes
SHA-256: 9fe6ee1b63a21f24f929ae366ff2d60c1d935d20b096d6b88286b0acf953b0ba
font_01_sfnt_off0000f877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF877 10608 bytes
SHA-256: 7b34f028eccc69b277de1a878be258145a67d53e58d2f3c51058ad162978957b