Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e2e61b755b738f7…

MALICIOUS

PDF

80.3 KB Created: 2021-04-06 14:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e99923f2d52fb9b9eefc40a52cb35a0 SHA-1: 291aa9687ca7cc2f9035fdeeadbb960fd70c414d SHA-256: 3e2e61b755b738f760d1aa5331bc0d89824d130e2182a146a9c941d1296930e7
134 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is a link farm on disposable hosting, and the presence of numerous URLs, including one pointing to 'golowaki.ru', indicates an attempt to redirect users to external, potentially malicious sites. The document's content, though heavily obfuscated, appears to be a lure for a 'fishbone analysis template excel', likely a pretext for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://golowaki.ru/123?utm_term=fishbone+analysis+template+excel
    • http://nosixavol.sportsontheweb.net/cursive_capital_letters_worksheet.pdf
    • https://cdn.sqhk.co/kaxovugefulo/jbZrhg0/free_powerpoint_template_food_safety.pdf
    • http://kinerexasuxemo.getenjoyment.net/suwasimeno.pdf
    • http://pawomodom.medianewsonline.com/40862661028.pdf
    • https://cdn.sqhk.co/baxorurifina/qhdjqhf/terminator_genisys_john_connor_transformation.pdf
    • https://cdn.sqhk.co/xekutenupi/iUoupee/zomumovabazi.pdf
    • http://dikoxikikalonib.scienceontheweb.net/lamutozaliwexivubojal.pdf
    • http://vizojuzoninunoz.scienceontheweb.net/how_many_calories_in_grilled_chicken_nuggets_chick_fil_a.pdf
    • http://lirinevewafa.mypressonline.com/bibibedibofedore.pdf
    • http://sifaritube.sportsontheweb.net/99888841677.pdf
    • http://javifimawa.mygamesonline.org/ielts_test_simulation.pdf
    • http://fiziwafofekaku.mygamesonline.org/wedding_couple_poses_download.pdf
    • https://cdn.sqhk.co/faxinomitux/hebhbhg/nhl_playoffs_2019_schedule.pdf
    • https://cdn.sqhk.co/bidekidarub/giiiZWb/tofifubej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/sonutopexaramuf/how_to_silence_adt_alarm_system.pdf
    • http://papawipowujujed.rf.gd/cast_android_mobile_phone_screen_to_pc.pdf
    • https://s3.amazonaws.com/kesumasaka/what_is_the_pricing_strategy_of_nike.pdf
    • http://gamelaluwer.myartsonline.com/calendrier_2020_avec_numero_semaine.pdf
    • https://s3.amazonaws.com/tufujifinobiro/ing_apps_crossword_clue.pdf
    • http://gipumupanaw.rf.gd/bryant_legacy_programmable_thermostat_manual.pdf
    • http://womidelere.myartsonline.com/chakrasamvara_tantra.pdf
    • http://fofilelajisemap.rf.gd/what_is_the_best_label_maker_for_home_use.pdf
    • https://s3.amazonaws.com/zidosozawok/best_android_tv_browser_2018.pdf
    • http://roxujewov.myartsonline.com/centrifugal_fan_design_methodologies.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eee5.bin
8f75e92ebd63476955c7a1cb07bfa1baaa7e127c9978b4b458eb147f2f1d1722		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE5 5132 bytes
font_01_sfnt_off00010027.bin
87278cfa05cedc491a030d63e36d594387ceeffa8a46669dcc1634ee76547f6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10027 10740 bytes
font_02_sfnt_off000124c3.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124C3 4324 bytes

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