Malicious PDF — malware analysis report

Static analysis result for SHA-256 6977110c949fc5a7…

MALICIOUS

PDF

78.7 KB Created: 2021-06-12 13:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0b55974246800525d0232259fa5a561f SHA-1: b1415a3adf34d2499097b9a74cbc54921ff26af7 SHA-256: 6977110c949fc5a7f6155bc905fe1edb37bac3796f622412d7d22eda64bd246a
186 Risk Score

Malware Insights

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

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 0.9997

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.
  • 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://queure.ru/pbw?utm_term=latest+general+knowledge+questions+and+answers PDF link annotation
    • https://komolelavox.weebly.com/uploads/1/3/4/5/134518501/776c190c407.pdfIn PDF document text
    • https://febamepu.weebly.com/uploads/1/3/1/0/131070604/lonidoxezukogaxikixu.pdfIn PDF document text
    • https://fobabugukejapa.weebly.com/uploads/1/3/4/5/134576868/4191257.pdfIn PDF document text
    • https://noserosajegupa.weebly.com/uploads/1/3/1/4/131453720/lupame.pdfIn PDF document text
    • https://kaseledewa.weebly.com/uploads/1/3/2/6/132682802/5455757.pdfIn PDF document text
    • https://vejanozamafiz.weebly.com/uploads/1/3/5/3/135351199/7af0472023dd.pdfIn PDF document text
    • https://xigolomo.weebly.com/uploads/1/3/4/4/134483438/0f01b.pdfIn PDF document text
    • https://lefafikof.weebly.com/uploads/1/3/0/9/130969708/nuremorad.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/1dc35ead-52a8-4872-bae7-dc37b64729bf/peg_perego_john_deere_pedal_tractor_with_loader.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67459c18-d4d5-4d5d-97ba-91d5bdaedfd9/is_knots_nautical_miles_per_hour.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47f82cf0-b1e4-45c6-990a-faeb1f54ddc6/what_is_chemotherapy_treatment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c04d2bb6-3f6b-46e7-a759-b9f84b832403/marvel_heroes_apk_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ce7ec1c-379a-46bc-a697-29751ab61e90/elemis_superfood_facial_oil_directions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18e0da07-22a4-43a3-a2dd-f340ba6fe4ea/punctuation_exercises_with_answers_grade_7.pdfIn PDF document text
    • http://ronakiko.pbworks.com/f/zombie_tsunami_mod_apk_2020.pdfIn PDF document text
    • http://zixereves.pbworks.com/f/fujosenujewovarixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/172d7c9d-ce29-43f3-9b6f-5ef116ccfe80/samsung_galaxy_core_prime_frp_unlock.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/w/file/fetch/144605247/82760193548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fed12687-b018-428d-bf53-998c31e54eba/zilujimulada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b193b5fb-e4fd-4119-947d-5e538e06e35a/jedujamabulubovejuxaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad7791fc-0cb2-42ce-8849-b131926d9c33/metolekujugabidovuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6536614-780a-494a-81c1-64525b1d4c2f/cub_scout_leader_uniform_inspection_sheet.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_off0000f482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF482 5216 bytes
SHA-256: abe2656703f631976ce448f06912ce9b30ecb9db0e24ff68717d82e87c3acdd3
font_01_sfnt_off00010662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10662 11648 bytes
SHA-256: 05e7cffeb0866d89e1f585fe1fcdcc81fc0f6a92dce46da73129bbbb99ce1d40