Malicious PDF — malware analysis report

Static analysis result for SHA-256 83f67e17fb89603e…

MALICIOUS

PDF

75.5 KB Created: 2021-04-09 03:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1dbebde52ffad0e9b3e455e36b04ca5f SHA-1: 28ca9a36a1796cd9f73b32636c87f3403977e47e SHA-256: 83f67e17fb89603e1d60443bd5959458deb529b72af70b735d4c15beeccab2fa
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary suspicious URL being https://soxebez.ru/strik. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM suggests the PDF is part of a link farm on disposable hosting, further supporting a malicious intent to redirect users. No scripts were extracted, but the overall structure and URL usage point to a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://soxebez.ru/strik?utm_term=finnegans+wake+nyc+menu PDF link annotation
    • http://betflixguvenilirmi.com/in_the_mood_glenn_miller_orchestra3tbe2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374366/normal_603eb7ca4c12a.pdfIn PDF document text
    • http://naturfresh.space/molecular_biology_techniques_manual04vgw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476434/normal_5fd3397abba68.pdfIn PDF document text
    • http://sabazat.22web.org/64219245495.pdfIn PDF document text
    • http://terugesit.iblogger.org/marx_eighteenth_brumaire.pdfIn PDF document text
    • http://afracheat3.xyz/lijawomejo415bx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449001/normal_60205eebf2f91.pdfIn PDF document text
    • http://creditreportfast.info/how_much_is_chromebook_in_the_philippinesis48a.pdfIn PDF document text
    • http://instapriz24.online/nolumpu9c3.pdfIn PDF document text
    • http://copyrightproblem.com/appium_plugin_for_android_studioegqk1.pdfIn PDF document text
    • http://harkateine.fun/872428538166oip9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fezabum.rf.gd/tizutosejotaga.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/coreldraw_x7_keygen_rar.pdfIn PDF document text
    • http://vizeroxati.rf.gd/anime_tv_english_dub_apk.pdfIn PDF document text
    • http://geruvidajiraje.epizy.com/53580857453.pdfIn PDF document text
    • http://peworesafasar.epizy.com/lerafo.pdfIn PDF document text
    • http://xifetofaramil.rf.gd/96076281505.pdfIn PDF document text
    • http://rozopujonabesix.epizy.com/kogerujumogaduxomubuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/52989547639.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/pumuzeduzamixufupote.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/city_mini_gt_double_stroller_car_seat_adapter.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/a320_hard_landing_load_report.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_off0000e961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE961 5204 bytes
SHA-256: ccd82b0d6d4b560e323db36ae401b03135fd933c379b922e65ca2a32e5bb9299
font_01_sfnt_off0000fb30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB30 10872 bytes
SHA-256: 108a0973de06dff6e1b4e0a39cae441b9d5c7fa4cb0d95a39dc9439590a0ab88

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