Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e337bb948bf5609…

MALICIOUS

PDF

74.9 KB Created: 2021-02-27 18:40:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3e8bde013e73ac3d8a698637d2338e10 SHA-1: 241005c406f0786ab0c7b711e194163d839d088e SHA-256: 9e337bb948bf56093d6ed0089351ea4212b58f6a883476a34c16081d030d71db
182 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to known malicious redirectors and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to research methodologies, further supporting a phishing or scam pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8829

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • 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://dafemum.ru/award?keyword=metodologia+de+la+investigacion+tipos+pdf In PDF document text
    • http://sipipewawezizuf.getenjoyment.net/nolalipanaxufujalukovegi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383467/normal_5fe5482347868.pdfIn PDF document text
    • https://xitosuwoga.weebly.com/uploads/1/3/3/9/133988858/1013983.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/jiOicgj/idle_hollywood_tycoon_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/nodujugebi/jhOhahb/fegogumovuwaro.pdfIn PDF document text
    • http://forexgeeks.net/bus_driving_games_for_pc_freeayzcu.pdfIn PDF document text
    • https://cdn.sqhk.co/tononapiwaso/ji4ji0K/skater_race_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/gddibgj/56959503904.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449788/normal_600f204f490f3.pdfIn PDF document text
    • http://italiahot.space/lovecraft_country_review_episode_4k2xwy.pdfIn PDF document text
    • https://cdn.sqhk.co/padixemugex/hQ7jhid/resokosaredejuwedate.pdfIn PDF document text
    • https://dofemavuxowag.weebly.com/uploads/1/3/0/7/130739836/jibukapakanugeb.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/basic_maths_formulas_in_hindi.pdfIn PDF document text
    • https://mitojebani.weebly.com/uploads/1/3/2/7/132711961/9498184.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/giWujhK/zudok.pdfIn PDF document text
    • https://terusabul.weebly.com/uploads/1/3/4/7/134702655/9db6784e09.pdfIn PDF document text
    • http://fastnoutservice.ru/meaning_of_answerable_questionshd95o.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/theories_of_motivation.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/5493522807.pdfIn PDF document text
    • http://flowerport.market/triple_j_ice_cream_ottawa_ily0l22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499656/normal_6007356e16552.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF954 5292 bytes
SHA-256: 439ee3d9eafd141386c9bd0489a3db93d40bb979bcf4e45bad62021fd7b19642
font_01_sfnt_off00010b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B87 10824 bytes
SHA-256: a04c2fa196c07b4a898c5c3966354698067e591fab32e86f2aa494423fb152e4

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