Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e08a802ac397792…

MALICIOUS

PDF

82.9 KB Created: 2021-04-27 00:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 26c403fb530d50f701817f87f159cdbe SHA-1: bf42ed420c321ecbef49d8229846accaa00ec4a7 SHA-256: 9e08a802ac397792eaec4da94977673288a14323cc3ea3d05fc46d80ec001eae
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, appears to contain search query terms, reinforcing the lure. The presence of ClamAV and ML heuristic firings, along with multiple unknown reputation URLs, indicates malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://leonvi.ru/strik?utm_term=when+is+the+next+pokemon+game+coming+out+2020 PDF link annotation
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/236836.pdfIn PDF document text
    • https://xinofebew.weebly.com/uploads/1/3/5/3/135305957/2449935.pdfIn PDF document text
    • http://bukanugizini.mygamesonline.org/ldc_answer_key_utkarsh.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/dadel.pdfIn PDF document text
    • http://palopej.sportsontheweb.net/58727387158.pdfIn PDF document text
    • https://rivibesosad.weebly.com/uploads/1/3/4/5/134529272/zuzijujuxigeju-soxureravekanev-faxizagoxuxuwe-sokasemuv.pdfIn PDF document text
    • https://gitefitibed.weebly.com/uploads/1/3/5/9/135968717/wijebajafaje-wopeponoke-gibevusakof-fudesevemawozog.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/wuwibawusovesosofofa.pdfIn PDF document text
    • https://taregegojife.weebly.com/uploads/1/3/3/9/133997559/d3a6e63.pdfIn PDF document text
    • https://pefibiwurabamiz.weebly.com/uploads/1/3/0/8/130874510/6225996.pdfIn PDF document text
    • http://nuvagefo.medianewsonline.com/agenda_2020_summary.pdfIn PDF document text
    • https://sajowomifekorur.weebly.com/uploads/1/3/4/3/134314212/2712759.pdfIn PDF document text
    • https://wexetapita.weebly.com/uploads/1/3/4/3/134307875/somajarigafegubufi.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/jewizopukuni/nutrition_info_sonic_popcorn_chicken.pdfIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_5add1777ad454ac38547784ea959c629.pdf?index=trueIn PDF document text
    • https://557345b1-98c6-442d-b460-9e357c178e5b.filesusr.com/ugd/dfb5f8_09b9cf7510bd457082ae3eb330ef470c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/voropa/39332287817.pdfIn PDF document text
    • https://a82c121c-2200-4cd7-aff6-47cf910fdadb.filesusr.com/ugd/117c17_3da2fc83d60b45e39ab5829b7dd24951.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e4e8ab1-fc4d-44ef-b933-0ce143239af1/biblia_de_jerusalen_consulta_en_linea.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/67725147118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa025f3f-454a-4848-9892-112ac86f1596/girl_with_silver_eyes_synopsis.pdfIn PDF document text
    • http://wudazebej.atwebpages.com/aerobic_and_anaerobic_respiration_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b6fb16f-c0df-4ca2-a87c-3f00c864aaa7/jvc_kd-x50bt_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/how_to_learn_basic_english_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeec2b1d-0b0a-4368-b49f-c4e88aa9a996/ditezuwabef.pdfIn PDF document text
    • https://2ffa788b-df2f-461f-b9c5-573bec542745.filesusr.com/ugd/374ce0_61d3f326bbe844c09f071cb463b11872.pdf?index=trueIn PDF document text
    • https://56076a71-1b70-41e8-afe1-d547c394b4ee.filesusr.com/ugd/ab0d05_ae7cfadda83d4de2be307f95b3de60f4.pdf?index=trueIn 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_off00010359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10359 5636 bytes
SHA-256: cd9933b223a2e3e9e5dbd61de87f22a496adeceb65aa7d639b34badf7763722e
font_01_sfnt_off0001167a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1167A 11600 bytes
SHA-256: a3497cec899760fa766f81d3bf20cbe2638a8762657563226e1d5ae35fcfb9e0