Malicious PDF — malware analysis report

Static analysis result for SHA-256 134c26081822609f…

MALICIOUS

PDF

79.9 KB Created: 2021-03-27 22:04:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 52dbb748719ee7f01a13b59e3d28e204 SHA-1: c22bb6cf1ba706d0a9312842196f4fc7866da55f SHA-256: 134c26081822609f8ac8c4c04cba1f761469bdf6df66d825827dbdc9e60bba21
134 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The presence of 'utm_term' parameters suggests a phishing or spam campaign aiming to drive traffic to malicious sites. While no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate a malicious intent to redirect users, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://midufefew.ru/aws?utm_term=coleman+inflatable+hot+tub+specs PDF link annotation
    • https://cdn.sqhk.co/nabotogemobe/ihhdgfh/nozifaki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417986/normal_5fda0e79a985c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417418/normal_6055531e7dda7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393353/normal_5fd6c424120a4.pdfIn PDF document text
    • https://cdn.sqhk.co/nesuxozajek/jdgcjbv/goat_simulator_payday_trophy_locations.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371023/normal_604dcbd17fcad.pdfIn PDF document text
    • https://cdn.sqhk.co/fefowofuk/jg1Zght/juego_zombies_don_t_run.pdfIn PDF document text
    • https://cdn.sqhk.co/kinifukix/ehdsTkK/lathe_speeds_and_feeds_chart_metric.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494432/normal_6001e34902913.pdfIn PDF document text
    • https://cdn.sqhk.co/rivojotewez/aha8PXa/rowowagudajisinesokur.pdfIn PDF document text
    • http://moviesaddaa.online/nubinemad6z16.pdfIn PDF document text
    • http://postel-na-zakaz.ru/wunder_von_bern_torwartulvfw.pdfIn PDF document text
    • https://cdn.sqhk.co/zozusexub/ihjb9jj/52155335363.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/lededinunnua77.pdfIn PDF document text
    • https://cdn.sqhk.co/vufebevefo/bHCTOL2/realistic_driving_simulator_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nezazexador/ie4QBgc/36200522155.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lapizepo.rf.gd/2197727853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f201c381-630e-4dfd-aafb-738ec3d8a3f5/levezasimololuwanopopo.pdfIn PDF document text
    • http://golofupatawef.epizy.com/android_9_pie_apk.pdfIn PDF document text
    • http://vexifebama.rf.gd/who_made_the_lunar_rover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a31c150-fde3-4956-aed3-e7fa025af38b/self_editing_tips_for_fiction_writers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/518560f6-56cb-4cc8-941a-78e522d577ef/what_is_the_theme_of_the_poem_ozymandias.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_off0000fb05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB05 5204 bytes
SHA-256: 65f2986cbc9d61e33c13491b907aa1194441794a5f4d47944381c80bc9c2162f
font_01_sfnt_off00010c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8D 11132 bytes
SHA-256: 149e48b61a6d8d9e772c3b23f8d23ee3157946aa6b3701777f8f12dd7e10cbd3