Malicious PDF — malware analysis report

Static analysis result for SHA-256 016c05c098392049…

MALICIOUS

PDF

84.7 KB Created: 2021-03-12 05:27:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 77329d702cf3854e8810943d8dfd2987 SHA-1: bf5d40adb609acce4c4ba444d90ed6eea57dc422 SHA-256: 016c05c0983920492e1dff1e887b54e1e5cfc74f47243917d5f1409f37a2346b
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one specifically pointing to a URL that appears to be a phishing lure disguised as a worksheet. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further suggests a link farm designed for malicious redirection. No scripts were extracted, but the presence of external links and the overall detection profile strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/award?keyword=irregular+plural+nouns+worksheet+pdf PDF link annotation
    • http://lizuzezusad.medianewsonline.com/the_power_of_positive_thinking_by_norman_vincent_peale_audiobook.pdfIn PDF document text
    • https://bunixidulot.weebly.com/uploads/1/3/5/9/135964284/7438793.pdfIn PDF document text
    • https://zenamuvevabun.weebly.com/uploads/1/3/1/4/131453902/1295337.pdfIn PDF document text
    • https://cdn.sqhk.co/vozaxodep/eVngiez/83724578542.pdfIn PDF document text
    • http://digovin.getenjoyment.net/62917061625.pdfIn PDF document text
    • https://lonojoxojiliw.weebly.com/uploads/1/3/1/4/131438577/6930563.pdfIn PDF document text
    • https://waboralitenir.weebly.com/uploads/1/3/4/5/134504299/lorivipu_bidujo.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/hfRiaii/winamp_music_player_for_windows_10_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/natefisaka/gigh2jf/49877497457.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/anlodipino_5_bula.pdfIn PDF document text
    • https://jabuvevakeg.weebly.com/uploads/1/3/4/6/134685488/vurug.pdfIn PDF document text
    • https://poxefapujo.weebly.com/uploads/1/3/5/3/135312596/2284293.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/what_is_six_sigma_lean_processes.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://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/sesekuziwagilidanesa.pdfIn PDF document text
    • http://gagolabirej.atwebpages.com/63651193709.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/67356174506.pdfIn PDF document text
    • http://moxixezegosa.onlinewebshop.net/world_war_z_goty_edition_review.pdfIn PDF document text
    • http://widusop.atwebpages.com/fender_hot_rod_deluxe_limited_edition_combo_amp.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE213 5228 bytes
SHA-256: b9f28978712a0dd8ef016c1b4238ee55b34d66e470a1f378c69f9f95c5869748
font_01_sfnt_off0000f3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E1 10660 bytes
SHA-256: beaece6f3fa52f78f2df1755fa00d4919e2ded43085d86d890aa508a0dcf0b50
font_02_sfnt_off0001182b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
font_03_sfnt_off0001262c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1262C 9416 bytes
SHA-256: 3e06468b90fb8b2adc385f64041e536a5a42dc13b8397fb3495b4fde1bed3ea0

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