Malicious PDF — malware analysis report

Static analysis result for SHA-256 24f5e4e6a780daa6…

MALICIOUS

PDF

94.1 KB Created: 2021-03-14 17:18:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 01bfba7bf65cf896179e48d243614940 SHA-1: 556e86c912fb8383bf1bbdbff798fa1093bab623 SHA-256: 24f5e4e6a780daa659fd855f4fdeccdc25d74eacf2fc0b4970e0dfd2a26402a8
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The sample was flagged by multiple heuristics, including brand-impersonation credential phishing and ML classification, indicating malicious intent. The presence of numerous external links, including one impersonating Amazon, suggests a phishing campaign. The document body, though heavily obfuscated, contains references to product keywords and application details, likely serving as a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://vetasokimatajed.weebly.com/uploads/1/3/5/2/135296406/pudatagipowaw.pdf.
  • 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://ponafet.ru/wb?keyword=frigidaire%20fghc2331pfaa%20water%20filter%20bypass PDF link annotation
    • https://vetasokimatajed.weebly.com/uploads/1/3/5/2/135296406/pudatagipowaw.pdfIn PDF document text
    • https://xafineker.weebly.com/uploads/1/3/4/7/134701786/tonaxerewe.pdfIn PDF document text
    • http://gopizapa.22web.org/copycats_crossword_answer.pdfIn PDF document text
    • https://goreduve.weebly.com/uploads/1/3/2/7/132740848/vomikosirot_limob_tibubejomow.pdfIn PDF document text
    • https://xisofapetuv.weebly.com/uploads/1/3/4/7/134747578/xowasiluwofom.pdfIn PDF document text
    • https://pimupaxepa.weebly.com/uploads/1/3/1/8/131857198/c207519f.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/b7380e9b-2c83-4b8a-a331-ab33c163cbfa/26142525742.pdfIn PDF document text
    • http://kebanibaru.epizy.com/making_of_the_english_working_class.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/20616475443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db9e2a96-0a06-452a-a119-0e8aa12b93bc/yoga_poses_for_weight_loss_in_a_week.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49a9eb3e-14c9-4c95-8c9d-a6210c9b1e99/peter_et_wendy_2021.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/film_boneka_chucky_full_movie_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/asphalt_8_for_pc_filehippo.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/how_do_i_reset_my_ubee_router.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/alphabet_franais_avec_image.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed904d28-1e01-40cc-a1bd-89212c4b0a07/default_password_for_netgear_router_v7610.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/wuzupazama.pdfIn PDF document text
    • http://memekafese.rf.gd/58886001701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c497b0d-079c-46a7-b6f9-ae152fe23609/best_paintball_guns_under_100.pdfIn PDF document text
    • http://logabijizuz.epizy.com/libro_caballo_de_troya_1_para_leer.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/meminoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/synonyms_list_for_third_graders.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37fa5218-2508-424f-9b56-307dc20925c4/93542271826.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_off00012ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CCF 6056 bytes
SHA-256: 23d92e87b4f7a9a6acc3590c545cc7cbabe78364a30f5c015b2a8f580b269ef6
font_01_sfnt_off00014185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14185 12612 bytes
SHA-256: d4696cf8bfd072b24babcd4d36e656d36488b3fc0583b548cf36ed9d44ed82d4