Malicious PDF — malware analysis report

Static analysis result for SHA-256 adec27c78a2f3b81…

MALICIOUS

PDF

77.2 KB Created: 2021-04-10 21:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: fe13dc0d500f19789ab49a732f73e506 SHA-1: 41f324ccbe298f626bb4b7052e5c8473a8efe30f SHA-256: adec27c78a2f3b8180c8e1576b40e3b46216f58ec88580e8795b3ade29ae88a0
156 Risk Score

Malware Insights

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

This PDF file is classified as malicious due to its extensive use of external links, forming a link farm designed to redirect users to potentially harmful sites. The document body, though obfuscated, suggests a lure related to search queries, likely to disguise the malicious intent of redirecting users to a phishing or malware distribution site. The presence of numerous external URIs and a high ML classifier score strongly indicate a malicious phishing or content-scraping operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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/strik?utm_term=how+do+you+turn+on+the+aroma+rice+cooker PDF link annotation
    • http://kajipim.mypressonline.com/kidde_kn-cob-b-ls_manual.pdfIn PDF document text
    • https://tavadubamik.weebly.com/uploads/1/3/4/4/134473349/dilumezexatavim_wirutu.pdfIn PDF document text
    • https://cdn.sqhk.co/fovuxugo/cifhe9M/gba_emulator_apk_file_download.pdfIn PDF document text
    • https://bazamafew.weebly.com/uploads/1/3/4/0/134016738/megedifeziveloj-jukujixok-sewepugew.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/23356376392.pdfIn PDF document text
    • https://zazibarem.weebly.com/uploads/1/3/0/7/130775746/nelifexotid.pdfIn PDF document text
    • https://cdn.sqhk.co/mofipife/ghPhdhf/35865100229.pdfIn PDF document text
    • http://dobilarujokux.sportsontheweb.net/bsc_horticulture_syllabus_igkv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/xujasorinesorexojupef.pdfIn PDF document text
    • https://6e345194-e688-4037-aa24-2ff230a16836.filesusr.com/ugd/ce9fe1_6629aec6705a4ade992e08b3af4573bf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/samsung_android_browser_hijacked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f014e12-e748-46c8-a1bd-b444d96edf6d/34669859801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d6b5f45-b3c8-4dc8-a70d-964a4e38f03e/how_to_reset_nespresso_lattissima_plus_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/238160419.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/80899366151.pdfIn PDF document text
    • https://f98f40d2-b649-4e6b-99af-b89bbf2331ff.filesusr.com/ugd/724bd4_b852512195bb438287313ea1641f0c01.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/70d2d389-2e51-4dbd-8481-862908b66945/true_story_behind_black_hawk_down.pdfIn PDF document text
    • https://a804c8a8-fdf7-4fba-b19b-c23aecc29597.filesusr.com/ugd/a7074a_23eb80bfcb134f13b82dd786424035a0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lebejos/taming_of_the_shrew_act_2_scene_1_script.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_off0000ef9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9D 5188 bytes
SHA-256: 80a99543f587a192f8edcefc95ddbed0506f1c91ea8be940014d70c9b054d605
font_01_sfnt_off00010128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10128 11184 bytes
SHA-256: 37f87699875f0918b394d4af900e22259d2fa66f5560ffdefd070212762d0617

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