Malicious PDF — malware analysis report

Static analysis result for SHA-256 7450922d839f072d…

MALICIOUS

PDF

76.7 KB Created: 2021-03-04 21:06:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5b15b879930f7ec62890264985fe0f35 SHA-1: fdb12f90c6c2f5bd0335a3d5f15821fba6552eba SHA-256: 7450922d839f072d4d70a07385eb332017d5809f8bfb434e56eba539adb1f481
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. ClamAV and ML classifiers strongly indicate maliciousness, specifically phishing and trojan behavior. The document body is heavily obfuscated and contains what appears to be junk data, but the presence of numerous external URLs suggests the primary purpose is to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/wix?keyword=groupon+axe+throwing+seattle PDF link annotation
    • https://cdn.sqhk.co/jobiwokojo/eiahbhe/krome_studio_coupon_code.pdfIn PDF document text
    • https://cdn.sqhk.co/wexovezojab/dOgejbl/bass_booster_equalizer_apkpure.pdfIn PDF document text
    • http://jafoxidulez.mypressonline.com/brother_intellifax_2840_toner_low_reset.pdfIn PDF document text
    • https://cdn.sqhk.co/bodegife/fufy9x6/global_war_on_terrorism_service_medal_eligibility_navy.pdfIn PDF document text
    • http://gixipures.sportsontheweb.net/tuzewabokojojedabisaxuxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490529/normal_5fdfd6834430d.pdfIn PDF document text
    • http://vizexibidoxi.getenjoyment.net/44749426694.pdfIn PDF document text
    • https://cdn.sqhk.co/wavagowew/geia7gi/calculate_percent_change_year_over_year_excel.pdfIn PDF document text
    • https://cdn.sqhk.co/zezetemirag/B7hhV3N/famous_movie_quotes_about_love_and_marriage.pdfIn PDF document text
    • https://cdn.sqhk.co/vifejoneses/qgehimN/4093844058.pdfIn PDF document text
    • http://santaparker.store/bikaner_university_ma_private_form_last_dates2p0f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478950/normal_5ffde61d34066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409811/normal_601416ee15d62.pdfIn PDF document text
    • http://sagunutu.medianewsonline.com/10732664892.pdfIn PDF document text
    • http://easy-money-cash.space/livewire_ts_7.308dqm.pdfIn PDF document text
    • https://cdn.sqhk.co/vefoveted/ofhbqgh/hd_wallpapers_for_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/vizinifum/1Y2pfid/wood_charcoal_shop_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/rogevuzazi/aHIhhhh/dune_runner_red_paparazzi.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/cV6ikw6/lixesezutilijesuxef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://93bb5028-8b17-4c47-8ab9-f46a024b0e86.filesusr.com/ugd/041612_4680a06c1e764f41a5ee6654d5d30dbf.pdf?index=trueIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_e7a96fd0cfbb485fbdc48d11e242c8a1.pdf?index=trueIn PDF document text
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_f016f923d1704d7e8f9d8f1ebda884d8.pdf?index=trueIn PDF document text
    • https://c84ffda1-e72a-45fa-8ce8-a771970cf326.filesusr.com/ugd/9fd656_6a12c5bcf6074a7284679d4b7ef23209.pdf?index=trueIn PDF document text
    • http://jimomurapujivo.onlinewebshop.net/gukovife.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_off0000ed03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED03 5272 bytes
SHA-256: 76f64356870b63365194af79300ab73293e91f8a94aac269dd2a2b3d3c905bff
font_01_sfnt_off0000ff0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0B 11440 bytes
SHA-256: b445edc8133d90b90a83b2b6ecf472adb70228bdfb6b467df213bd7365acfcdc