Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fb3854466a39cb0…

MALICIOUS

PDF

70.8 KB Created: 2021-01-21 18:48:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: df1b67001b27a8d114661852012871e1 SHA-1: 124a5f52247451f34bae2081a3af65f5a193cb1b SHA-256: 6fb3854466a39cb0de37cd144e55f90847c9426960059b779c1dcb607bd080d4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains or link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to trick users into navigating to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafficel.ru/123?utm_term=hp+2310m+monitor+price PDF link annotation
    • https://juxufosuzuvol.weebly.com/uploads/1/3/1/4/131437906/2250410.pdfIn PDF document text
    • https://roxupabepali.weebly.com/uploads/1/3/4/6/134611875/pezugunasuk.pdfIn PDF document text
    • http://setifol.66ghz.com/cm_security_vpn_mod_apk.pdfIn PDF document text
    • https://site-1247036.mozfiles.com/files/1247036/declspec_dllexport_template_class.pdfIn PDF document text
    • https://site-1168131.mozfiles.com/files/1168131/killer_bean_unleashed_hack_apk_free_download.pdfIn PDF document text
    • https://xidokuwu.weebly.com/uploads/1/3/1/4/131453793/nolovasazevavox.pdfIn PDF document text
    • https://cdn.sqhk.co/dodiniwotud/RLhhwjj/phototools_2_review.pdfIn PDF document text
    • https://cdn.sqhk.co/veludewozen/bLhgTVg/super_brawl_universe_mod_apk_obb.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/zHgfdhd/piano_apps_free_download_for_android.pdfIn PDF document text
    • https://pupuwovojetisig.weebly.com/uploads/1/3/1/4/131438468/4175908.pdfIn PDF document text
    • http://vojituvidur.iblogger.org/erroll_garner_sheet_music.pdfIn PDF document text
    • https://site-1171534.mozfiles.com/files/1171534/32794338544.pdfIn PDF document text
    • https://site-1172540.mozfiles.com/files/1172540/design_brief_template_word.pdfIn PDF document text
    • http://bezigex.iblogger.org/g_s_m_ki_full_form.pdfIn PDF document text
    • https://cdn.sqhk.co/tudobele/ojljgjg/30639384212.pdfIn PDF document text
    • https://site-1171149.mozfiles.com/files/1171149/chess_opening_blunders_full_apk.pdfIn PDF document text
    • https://powumebaporisav.weebly.com/uploads/1/3/4/8/134891471/poguzamuvomup.pdfIn PDF document text
    • https://site-1177029.mozfiles.com/files/1177029/bjs_sheet_cake_order_form.pdfIn PDF document text
    • https://site-1242381.mozfiles.com/files/1242381/pajapekir.pdfIn PDF document text
    • https://site-1218146.mozfiles.com/files/1218146/solidworks_flow_simulation_tutorial_2017.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sarozaxag.epizy.com/12341289302.pdfIn PDF document text
    • http://ruxurosagogaru.epizy.com/85662800877.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_off0000d856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD856 5112 bytes
SHA-256: 98379cda47db996980bb6cc6fb6c0675ceb34399bf46f3240e8f631b110e3554
font_01_sfnt_off0000e9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B5 10504 bytes
SHA-256: bdb621956e59394ff3aedc78e589650d055e6f6e547de56fbb44c0a223882943

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