Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0a42e650f5c1aa…

MALICIOUS

PDF

73.1 KB Created: 2021-05-18 19:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 00fe6b8a53fec583a6412046ca877433 SHA-1: 52e8aac6f3bc69c7aba861be611ec39f5fb482c2 SHA-256: 7e0a42e650f5c1aad9594f4a67c8c8ae0e7467437d9cf24533b01abecc46f6ff
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://botokaw.ru/wb?keyword=what%20is%20built%20in%20method%20in%20python', is presented as a search result, indicating a lure. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/wb?keyword=what%20is%20built%20in%20method%20in%20python PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378843/normal_604af1a88c13d.pdfIn PDF document text
    • http://buvofigutunam.22web.org/rojedejekiwola.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495402/normal_602afd44d2ec4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453108/normal_601f19c4b4a00.pdfIn PDF document text
    • http://kibukulatari.22web.org/tusobafok.pdfIn PDF document text
    • https://daxusumupazi.weebly.com/uploads/1/3/4/7/134702932/nepeg.pdfIn PDF document text
    • https://guvopizap.weebly.com/uploads/1/3/0/7/130776702/matuvojuxof.pdfIn PDF document text
    • https://wuxavuzipirugud.weebly.com/uploads/1/3/4/0/134012349/9ce95d081ce0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418778/normal_5fdd670b3f0b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403685/normal_5feef0f5c3781.pdfIn PDF document text
    • https://nonaxoboru.weebly.com/uploads/1/3/4/4/134467623/wijemobenofad_wibejasawopo.pdfIn PDF document text
    • https://setejurisu.weebly.com/uploads/1/3/2/7/132740540/wipifevog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384464/normal_606be8b69e15e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_606d3777427d3.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/mudurixo/app_store_not_ing.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/watiberoget.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/85095439541.pdfIn PDF document text
    • http://fezekugagow.rf.gd/75723685415.pdfIn PDF document text
    • http://tedonipevafipe.epizy.com/how_to_adjust_temp_on_pfister_shower_valve.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/nosoxugasovekoboroburaz.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/katy_perry_roar_official_video_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/panasonic_bread_machine_sd-zb2502.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_off0000e15b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15B 5356 bytes
SHA-256: 16674ac3e73b5fcbaa506814aaa1c5e5879ef0d7815cff937b5272f6d68f6ea2
font_01_sfnt_off0000f37c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37C 10452 bytes
SHA-256: ce69f78c1ec85e0d051434b37b9d2d6d9269a1c03aa4ab0e2487969a764ed14d

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