Malicious PDF — malware analysis report

Static analysis result for SHA-256 a07b82eef18cb502…

MALICIOUS

PDF

83.3 KB Created: 2021-04-04 21:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 00525e5e0e9b96fa1fa320154c838a1c SHA-1: 12a91e98bc998919b402ae52951c81b7c8756c0c SHA-256: a07b82eef18cb50238c0a267645af4ae03f79e8ad190b01c25efaac8ac87ce9a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/wix?keyword=jack+black+mars+attacks+gif PDF link annotation
    • http://delayikapy.xyz/best_machine_learning_books_for_absolute_beginnersa2idh.pdfIn PDF document text
    • http://rowefuzoj.mygamesonline.org/8th_grade_science_book.pdfIn PDF document text
    • http://wordsideget.top/susixesuwamatewapovitew33808.pdfIn PDF document text
    • http://smotrikino.fun/how_to_use_the_em830_digital_multimeterb6o9p.pdfIn PDF document text
    • http://businessmentality.com/567259936365nwv6.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/ludovolifebatab.pdfIn PDF document text
    • http://toppiksnack.xyz/nizuj95o4o.pdfIn PDF document text
    • http://card2card-perevod24.site/blue_rose_flower_images_free_hd1u5l3.pdfIn PDF document text
    • http://mgacessoria.online/nufugalovelavowugps5mn.pdfIn PDF document text
    • http://fashion-deals.xyz/74213723546hsj8a.pdfIn PDF document text
    • http://probkin34.xyz/fedex_trade_networks_careers_memphis_tn3cfdo.pdfIn PDF document text
    • http://o-karte-kopilka.com/buy_diablo_2_lord_of_destruction_cd_keylwf8p.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/396be7ac-9b33-48af-8cc4-d551a35cd169/what_are_the_assessment_tools_in_learning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b287de9-b4b8-46ac-9dc3-bb5844080167/98997994057.pdfIn PDF document text
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_4ada3e95616c488f988f7b24aa235436.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/marisedajuguzapafimirin.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/86577548479.pdfIn PDF document text
    • https://4b523d79-2bc6-404f-8e52-0acae4d2cb03.filesusr.com/ugd/fe1b41_3afa420033cd45418765bbe6cf8e1086.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/jesodofupojujipa.pdfIn PDF document text
    • https://a1359116-1358-4cde-afc5-3600b4bb50db.filesusr.com/ugd/3b0c81_0113060125c34f3a976592e9ae99be13.pdf?index=trueIn PDF document text
    • https://c6111751-42b6-464f-a8b1-832d492ff999.filesusr.com/ugd/3d0627_1d124bd444ce4dc8af88114b2370c3e7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0fe9024-a45c-4ceb-b44f-2f886be7c212/87688442673.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/how_to_perform_a_financial_analysis.pdfIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_5cfa130721ec4c659eba72a0208bc188.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4eebd0c-7803-47d6-8b6f-255cbd7915a3/90649658000.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_off00010adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADB 5396 bytes
SHA-256: 49aa7cf48cbe8bac1cf81eac3ac13e5d56db9311d6299864785aad1b4b6d9685
font_01_sfnt_off00011d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D26 10128 bytes
SHA-256: 37356bb576d02bc632e85ef88aa93c0e0d9cb980011f38ac9365e2f675d115ba