Malicious PDF — malware analysis report

Static analysis result for SHA-256 1add3521505523b2…

MALICIOUS

PDF

81.6 KB Created: 2021-05-30 20:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 05f52f5571bd637425f434945d925269 SHA-1: 61bbc4784f83ed949170bbf31d1421ab44ca9944 SHA-256: 1add3521505523b26a9af814c837939ac68956982a91db8d590e506c353bf1ee
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of embedded links, many of which point to disposable hosting or redirect to malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=breast+firming+cream+diy In PDF document text
    • https://jipafopabos.weebly.com/uploads/1/3/3/9/133986828/9905062.pdfIn PDF document text
    • https://xivovawa.weebly.com/uploads/1/3/4/8/134875493/6861528.pdfIn PDF document text
    • https://vilomaranetuxer.weebly.com/uploads/1/3/4/5/134502128/62651.pdfIn PDF document text
    • https://vuguzakinizole.weebly.com/uploads/1/3/4/4/134493236/roseromen.pdfIn PDF document text
    • https://gebajujevaxudod.weebly.com/uploads/1/3/5/3/135398545/3679e00ffd2.pdfIn PDF document text
    • https://romarifekaxa.weebly.com/uploads/1/3/2/6/132683260/vavutevefawifu.pdfIn PDF document text
    • https://fezulenigi.weebly.com/uploads/1/3/4/4/134485980/8949903.pdfIn PDF document text
    • https://bezakolat.weebly.com/uploads/1/3/4/3/134321390/metevowub_vewefumux.pdfIn PDF document text
    • https://xedatuvigino.weebly.com/uploads/1/3/4/5/134580066/6811f5f.pdfIn PDF document text
    • https://xotukowigadane.weebly.com/uploads/1/3/4/6/134683058/981237.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410222/normal_5fdef6132ab7d.pdfIn PDF document text
    • https://xokotenesuku.weebly.com/uploads/1/3/1/4/131438709/0660235fb.pdfIn PDF document text
    • https://jiburivaduvu.weebly.com/uploads/1/3/4/4/134473865/novetuwow-tepabenemitiv-nibejaguwemaxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426547/normal_6032fea217069.pdfIn PDF document text
    • https://poxolegap.weebly.com/uploads/1/3/1/0/131069824/vususugewodedo_fiwavox_tomuleneg.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/2ef8f827-d284-452a-ac3c-1d80fd37fc67/41154129234.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1767106f-c07a-4c7c-993c-41b95aad5fec/why_does_my_lg_washing_machine_not_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b2f0b98-f598-4897-88e1-c489f58e8d10/digamutabilume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b4bac35-db9f-4cae-9271-878546b19a00/planet_fitness_freeze_my_account.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00de8251-6996-47dd-8469-404ddd6c6258/pelicula_la_charca_con_adamaris_lopez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e14e7fb-5497-413f-bb29-0ebcb4dbecaf/counterculture_movement_goals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0685d129-42ab-4a94-8903-b9a47ac2aae0/9992198375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88636047-fcfe-4ac8-a0f5-f52ed6792b8e/pasos_para_realizar_un_sermon_biblico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01049ac3-3ca0-4bf7-94a2-09d8df8bafd1/98860247506.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000feb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB3 5460 bytes
SHA-256: e185849c60817d3cfdd6625334164dd787296e4ac78dd573ed827d89d82227e2
font_01_sfnt_off0001113b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113B 11144 bytes
SHA-256: a9c4364c57186136366e510e54e29822accd6c0d0bc52a0ec91e52f72e1f6b69

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