Malicious PDF — malware analysis report

Static analysis result for SHA-256 70544c4c70da5d7a…

MALICIOUS

PDF

90.0 KB Created: 2021-06-10 17:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 87d2ad48a3e26558fdb1822686619180 SHA-1: 21cd7cf8755a8500932486d1dfc0db82098a14c4 SHA-256: 70544c4c70da5d7a22b779fe407cfa6cb4bfe7014758b6b4f69379121a02e8de
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://huntic.ru/pbw?utm_term=kendriya+vidyalaya+8th+class+admission PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4487905/normal_60b763547bab6.pdfIn PDF document text
    • https://tavigawatogup.weebly.com/uploads/1/3/5/3/135389884/mavesanu_lepozulu_getixi_gutujer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455898/normal_60634d3111e7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495050/normal_60059a56d032d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476930/normal_60642abd9a708.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484376/normal_6021e80e9fd32.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4417319/normal_60b5e6ace8106.pdfIn PDF document text
    • https://puxipevabama.weebly.com/uploads/1/3/4/3/134308905/8108748.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496810/normal_5fed4a7a3996a.pdfIn PDF document text
    • https://xupazipul.weebly.com/uploads/1/3/5/3/135325103/9510617.pdfIn PDF document text
    • https://xinufagepowe.weebly.com/uploads/1/3/4/4/134437511/c22d053f266ad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/439f3037-b4e6-4aef-b9ca-db89cbd8cd37/disney_beauty_and_the_beast_full_movie_in_tamil_download_in_tamilrockers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40acd2c3-1037-4903-8024-1d382f5d79e3/cuando_mide_un_metro_cuadrado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ea80186-d6f1-4a45-b7a0-20722f20bc5d/how_to_set_outside_light_timer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70cf4a33-47b3-4edd-bfb7-cff895508e9b/mens_health_training_guide_2018_download.pdfIn PDF document text
    • http://lovixov.pbworks.com/w/file/fetch/144826746/tera_chehra_jab_nazar_aaye_adnan_sami_song_status_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8d8873b-ec0f-4b11-a4d5-bb1a18e4ce43/37625451261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb645f0c-9ff8-46ee-bb3f-c74239e7f214/10371890284.pdfIn PDF document text
    • http://liguduper.pbworks.com/f/super_bomberman_game_apk_download.pdfIn PDF document text
    • http://xizisimavi.pbworks.com/w/file/fetch/144605244/31892785670.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA80 5504 bytes
SHA-256: eb5f280f8b9416ba67b7d36cb88b9edab549d100c091c1adbad0cc84d6afd07a
font_01_sfnt_off00010d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1D 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off00011881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11881 10964 bytes
SHA-256: 3b94c2fbc9e1741b90c3f2ea3848d7b7ee2dc15d042843ff95bcd0f7c8221e4d
font_03_sfnt_off00013df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DF5 8556 bytes
SHA-256: b95c1971d1fe642d7f68baef7d1abfd4e7732543e8ad240c3170d7b435b26bcf

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