Malicious PDF — malware analysis report

Static analysis result for SHA-256 025088163215df3b…

MALICIOUS

PDF

79.2 KB Created: 2021-04-05 22:43:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2e55ae4ecb27092d12fc423fb98be7b6 SHA-1: 7904e356bd298e4a98f36b256cf2ecdf355a5fe7 SHA-256: 025088163215df3b376b338210100c6f1b4bc9892502280ce6cef83b32ceb405
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic analysis revealed it functions as a link farm, embedding a large number of URLs pointing to disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://golowaki.ru/strik?utm_term=white+christmas+1954+cast+ages PDF link annotation
    • http://xugaguf.mypressonline.com/buku_percakapan_bahasa_arab_sehari_hari.pdfIn PDF document text
    • https://cdn.sqhk.co/wutakuvi/chadtQg/10035887772.pdfIn PDF document text
    • https://cdn.sqhk.co/tugirujozi/hidAdje/72841023343.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/he0gihg/tojojebozovemisuwiwenug.pdfIn PDF document text
    • http://disupiwalu.mypressonline.com/80197420655.pdfIn PDF document text
    • http://dufifudusimube.mygamesonline.org/pakistan_journal_of_botany_research_papers.pdfIn PDF document text
    • http://vuxokiwi.22web.org/mebab.pdfIn PDF document text
    • https://cdn.sqhk.co/bexuxoxabim/7Giaejd/air_jordan_12_retro_snakeskin.pdfIn PDF document text
    • https://cdn.sqhk.co/sulukuxewef/rpgjeMw/happy_new_year_audio_song_free.pdfIn PDF document text
    • http://merexazumebenag.medianewsonline.com/body_language_in_marathi.pdfIn PDF document text
    • http://jirusulixozome.scienceontheweb.net/63262890260.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/aircrack_ng_linux_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/jKq3CAe/nubalubadigowed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zidaposiwogo.rf.gd/muzegiramev.pdfIn PDF document text
    • http://wipibefab.onlinewebshop.net/interpretacion_de_sueos_freud_libro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f58f08a-967d-45de-82cd-7e512df0a2a6/nezam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbb00223-4183-45a9-9933-253122785f3e/what_slows_gi_motility.pdfIn PDF document text
    • http://ziketikivanodiw.epizy.com/diamond_infinite_edge_adjust_draw_weight.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE891 5184 bytes
SHA-256: 1ed3b92371b30580a0c6d58809451803f5b54eec665ef7b7d4d4383ce7727f76
font_01_sfnt_off0000fa44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA44 11796 bytes
SHA-256: 61ea86dd1a53c1b2124b107812dec9b28548f0652511c120f0d9763e9ac35588
font_02_sfnt_off0001218b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1218B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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