Malicious PDF — malware analysis report

Static analysis result for SHA-256 7761977c92fe1844…

MALICIOUS

PDF

71.8 KB Created: 2021-03-14 10:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8b43a75aad00f928f9c7deadbc27a638 SHA-1: bdeb52ae29ee0afb2b80e040a215c464b19a7206 SHA-256: 7761977c92fe18440b5c4b66e7fde814617433b74e42cf0e4d9b7bf01f21b7bc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and the overall structure suggest an attempt to trick users into visiting a compromised website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://baarspo.ru/wix?keyword=duck+life+4+unblocked+hacked PDF link annotation
    • http://italdom.fun/zedukatupimozatezafijlotd.pdfIn PDF document text
    • http://nickned.me/94532893319dvyxl.pdfIn PDF document text
    • http://zivolizukaliwa.iblogger.org/xoroposotuvin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464995/normal_5fca828c45c49.pdfIn PDF document text
    • https://xotizirew.weebly.com/uploads/1/3/1/8/131855992/2181437.pdfIn PDF document text
    • http://afracheat8.xyz/85813105354tn18t.pdfIn PDF document text
    • https://zavoroxovedigij.weebly.com/uploads/1/3/1/3/131398250/poripevoxebaxav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390328/normal_600977e6a111f.pdfIn PDF document text
    • http://uniques.space/523324996868dsal.pdfIn PDF document text
    • https://xoregofejaba.weebly.com/uploads/1/3/4/6/134651656/kopakupogokowa.pdfIn PDF document text
    • https://wosufibataba.weebly.com/uploads/1/3/4/8/134866098/7332659.pdfIn PDF document text
    • http://thesalle.xyz/how_to_use_maverick_thermometer9lb0m.pdfIn PDF document text
    • https://mugebixivezir.weebly.com/uploads/1/3/1/4/131484268/6582225.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
    • https://s3.amazonaws.com/befafuni/lodizitoxuvubo.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/wicked_defying_gravity_piano_sheet_music_free.pdfIn PDF document text
    • http://nisejozexur.epizy.com/is_yamaha_launching_rx100_again_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/what_is_ancient_greece_most_famous_for.pdfIn PDF document text
    • http://nabiderafiwo.epizy.com/pefafevasepakikaretuvilu.pdfIn PDF document text
    • http://nipesuvaz.epizy.com/27981361231.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/aapl_stock_earning_report_date.pdfIn PDF document text
    • http://jenesigafepi.epizy.com/goa_beach_images_hd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEF 4928 bytes
SHA-256: 836715e4f08abbc21a9a05acd2c2631398e86530786841e84bd746ddc22feed0
font_01_sfnt_off0000e0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AD 10372 bytes
SHA-256: fe6e632a8ea42c713ca3d70e70c53bc15a0b27ae0b75c44b6acb32616583265d
font_02_sfnt_off00010405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10405 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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