Malicious PDF — malware analysis report

Static analysis result for SHA-256 04dc1e87b044ff44…

MALICIOUS

PDF

76.9 KB Created: 2021-06-09 09:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 527a791d19e9c6e3465077f5c72828fa SHA-1: 4d8f4ed5f115e2d89d71b5ae2f03aac5350b4a53 SHA-256: 04dc1e87b044ff44da682ad404ec1ed85d0fd2b2e568f3d7734d0310f5742325
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/pbw?utm_term=smart+view+mirroring+pro+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368746/normal_60b97b271c7a9.pdfIn PDF document text
    • https://vevumugenewasu.weebly.com/uploads/1/3/0/7/130776279/dutunifowugivo_fawebabugut.pdfIn PDF document text
    • https://sudivepa.weebly.com/uploads/1/3/5/3/135315425/6053845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368741/normal_5fd290b947a01.pdfIn PDF document text
    • https://gedenotovet.weebly.com/uploads/1/3/1/3/131379555/399427f37ee.pdfIn PDF document text
    • https://zinexosodolawiw.weebly.com/uploads/1/3/4/2/134235462/4328005.pdfIn PDF document text
    • https://nexakolaligu.weebly.com/uploads/1/3/1/8/131871479/4905138.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/be251649-d41f-4937-9cb2-fe97b8f887c8/glacier_bay_faucet_aerator_assembly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87257402-6781-4db4-b2b7-0ffec2471c19/suzedajime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c7c9b38-399c-45ac-a2ec-51dc12e2409a/10227846604.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2085e51-aa11-40c2-a7fe-dc131843d7e9/denofawekuletukizene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84935eb1-cec9-429b-94cb-5c5d19a53b78/kiraxulenefegoveb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ab445a6-c611-48b0-8e4c-f0db9502caf5/race_in_america_matthew_desmond_citation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/181c86b3-3206-4714-9c50-f2f34486c1f4/burning_chrome_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56fbfdab-a52a-46b7-aa8c-c201d0d9ca3d/modern_family_season_7_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88a69dfc-38d4-43e9-af2d-eb1f41634c16/wahl_peanut_trimmer_target.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1351da1a-729f-4093-b08d-e03e811f35e0/medical_surgical_nursing_10th_edition_elsevier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d56bb13-b9c8-43df-9bbd-ea25e6321498/magic_black_piano_apk_mod_vip_unlocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d1285b6-1992-4eed-bd75-a918c894b9a4/how_to_reduce_your_small_business_tax_bill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec65dd45-0926-4198-9293-c1797002e222/9942683314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ee8a05e-8dfc-44df-bc97-563242cd85aa/45632650171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b03e177-b329-4937-9284-52908dcd69ee/75705926098.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2296312d-9792-4c7b-a7d0-03741d3dacb8/65646491110.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_off0000ea04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA04 5248 bytes
SHA-256: 072b5b0b40f92c84a885e35bf87a74a4cb4bb016e8a2ceb2a15c7b9e03ad9b11
font_01_sfnt_off0000fbde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDE 12824 bytes
SHA-256: 7bb68a397e2c97067a0680df01d77e03551a064b5beabe8e459c151f24b231aa

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