Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabf32c7b9f1013e…

MALICIOUS

PDF

67.1 KB Created: 2021-03-09 19:48:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: bb2a524b939b58f17128d8e2ab689799 SHA-1: a66b6fd80b20cb81a607d7137a58caa02216d413 SHA-256: eabf32c7b9f1013e7f141e033d7d3c79229f3224e462404150f29fc033e5b7c2
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs, such as 'https://pelibifir.ru/strik?utm_term=lineman%2527s+and+cableman%2527s+handbook+eleventh+edition+pdf', are central to this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://pelibifir.ru/strik?utm_term=lineman%2527s+and+cableman%2527s+handbook+eleventh+edition+pdf PDF link annotation
    • https://zajefogana.weebly.com/uploads/1/3/1/4/131407312/samamigig.pdfIn PDF document text
    • https://ruxibudowivuk.weebly.com/uploads/1/3/4/7/134728491/suginames-munobulilapuveb-larimem.pdfIn PDF document text
    • http://tujomof.22web.org/what_is_exodus_called_in_hebrew_bible.pdfIn PDF document text
    • https://fuzewejobedogu.weebly.com/uploads/1/3/1/4/131482867/2423045.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465269/normal_5fccb55a74284.pdfIn PDF document text
    • https://noguvipeves.weebly.com/uploads/1/3/4/7/134717425/zuwivunakiwu.pdfIn PDF document text
    • https://nuguzawopaji.weebly.com/uploads/1/3/4/0/134040365/057dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449187/normal_5fe28e8f219c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455185/normal_6013e053c3b57.pdfIn PDF document text
    • https://jomokojexenubi.weebly.com/uploads/1/3/4/8/134877089/womenu-jutononilede-gevazamezowo.pdfIn PDF document text
    • https://kipopidetudi.weebly.com/uploads/1/3/1/4/131407440/f92baf.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/12084fe6-22fd-4a40-85dc-5daccca9f76a/what_to_do_if_ipad_keyboard_doesnt_work.pdfIn PDF document text
    • http://padijajuvon.rf.gd/sinuxufibobonobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5121098-b3b8-40f3-b2b0-01b463aa40f9/html_to_converter_php_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d1b651e-d930-46da-a250-fb4c8b860d87/16314118263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbe619cc-5a99-4532-b7b7-5d5a9d711da7/86579557744.pdfIn PDF document text
    • http://jirizaxewusi.epizy.com/lupamukupitavagukufut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd16c04f-a53d-4bc7-a2c5-43543dc8d9c9/bozunejokakameraxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e89d212a-ab55-4073-9ca2-9b03b3b8f310/singer_stylist_543_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/317a5cba-b70c-4208-b05d-87f0115da601/kanemekemodalinem.pdfIn PDF document text
    • http://tugojolowok.epizy.com/lebodemorogidulak.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_off0000c8b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B6 5536 bytes
SHA-256: bd7a5c46ee8739919108f4b0a45eaec2117433cb60504738eb2e2f8739c915a5
font_01_sfnt_off0000db68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB68 10352 bytes
SHA-256: ae218017430057471b4556ef520eebece8e1e8addbbbba2eaee64a5be03ae9c0