Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00084ea061b451f…

MALICIOUS

PDF

75.8 KB Created: 2021-03-17 07:51:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: f978545d0aa777a68215af9827f7ce5d SHA-1: 996d2a1dc23a085411af6340a8c6feaab1f188b4 SHA-256: a00084ea061b451fe50f9f5f48daaa4ceecb295b9dea748c9ce5c79a19cf8ebd
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary suspicious URL pointing to druttle.ru, which is likely used to host malicious content or redirect to phishing pages. The document body, though heavily obfuscated, suggests a lure related to 'housebuilding' or DIY guides, a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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.
  • 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://druttle.ru/wix?keyword=housebuilding+a+do-it-yourself+guide+revised+%2526+expanded+pdf PDF link annotation
    • http://xafujusopanegax.iblogger.org/4689194188.pdfIn PDF document text
    • http://ginutojuluxuvo.iblogger.org/estomatitis_aftosa_en_nios.pdfIn PDF document text
    • http://mafewagidimu.22web.org/mumisetonarefimusigubu.pdfIn PDF document text
    • http://kepojitu.22web.org/90136598274.pdfIn PDF document text
    • https://cdn.sqhk.co/gumorefose/gVfgjgS/woodworking_projects_that_sell_at_craft_shows.pdfIn PDF document text
    • http://fapubozapanez.iblogger.org/vitamins_basic_information.pdfIn PDF document text
    • http://kapusta.pro/tetemibarupozovexevokelepiejr0.pdfIn PDF document text
    • https://cdn.sqhk.co/rirexiwudag/hgFhhhi/jakogorirufoti.pdfIn PDF document text
    • https://cdn.sqhk.co/domonuxasi/hjgjKgh/23392899061.pdfIn PDF document text
    • http://laulu-go.ru/14240890241hplkk.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/ig9DTgh/best_ninja_turtles_shows.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/a1Pia4T/vediro.pdfIn PDF document text
    • http://tuxiwos.iblogger.org/65929824582.pdfIn PDF document text
    • https://cdn.sqhk.co/xavonepez/EicQgcV/vegas._com_promo_code_may_2019.pdfIn PDF document text
    • http://prodive.su/cobra_sz_driver_2020_reviewacuce.pdfIn PDF document text
    • http://banquepopulaire-fr.org/casio_solar_watch_not_charginghgjeq.pdfIn PDF document text
    • http://medicinfo.online/one_of_us_is_lying_movie_age_ratingzqhhy.pdfIn PDF document text
    • https://cdn.sqhk.co/kuruwoke/hahk7wp/words_crush_hidden_themes_cities_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3678f30-7923-4257-89fa-8edd6a1bd1d2/the_chrysalids_audio_chapter_2.pdfIn PDF document text
    • http://vanudedu.epizy.com/traxxas_stampede_2wd_chassis_brace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1706da6b-a756-48e1-94e6-35a20ce69c08/59699438099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1bf75e5-5628-4277-b076-6495fcf25cb4/42526451309.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50a4831e-9310-40dd-b155-b7e11122f5a9/safoluw.pdfIn PDF document text
    • http://mekiferajixoboj.rf.gd/5642488061.pdfIn PDF document text
    • http://ninadolubexur.rf.gd/63429523809.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd6726a4-4c2d-4969-ae90-c194c2d2c8ca/zowinuterowegov.pdfIn PDF document text
    • http://jetedobov.epizy.com/miwir.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_off0000e881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE881 5368 bytes
SHA-256: 535ee1b1f9e4adc116b4317e8bee726d6520eb10407f7b3ee3c4097be5128b15
font_01_sfnt_off0000fae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE3 11288 bytes
SHA-256: 3af54542bd3e95d8abfa6bba3b1a6364fd910b5ca8e0e2e4723330817438fcfa