Malicious PDF — malware analysis report

Static analysis result for SHA-256 8923ee98862d8d4a…

MALICIOUS

PDF

72.4 KB Created: 2021-06-04 16:40:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4e002b447beeffe51be152b26ef0c0c9 SHA-1: 72732629dc2edb38193d90f75bb01dc7fb3418eb SHA-256: 8923ee98862d8d4a80ff232eee6b167d1b38b4f18e9b7b3083fa95266aecca1a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://allytemp.ru/pbw?utm_term=how+to+start+english+speaking+club PDF link annotation
    • https://ripabefemedoge.weebly.com/uploads/1/3/4/3/134321398/kurazaxazuretuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393638/normal_6060fad202482.pdfIn PDF document text
    • https://nuviwusu.weebly.com/uploads/1/3/4/4/134486429/logidizizotuvo.pdfIn PDF document text
    • https://bexukisutiso.weebly.com/uploads/1/3/0/8/130873741/8061638.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374835/normal_601d7f3c8e14d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461211/normal_6021902c7567f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443821/normal_60479ed24b1a0.pdfIn PDF document text
    • https://vatizojisizekig.weebly.com/uploads/1/3/4/8/134852150/kodonikobox_povawokokavu_sijumutibu_rupesonilezato.pdfIn PDF document text
    • https://pubedazemel.weebly.com/uploads/1/3/4/8/134870130/972da96.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nitezug.pbworks.com/w/file/fetch/144498156/what_is_the_new_song_of_blackpink_2020.pdfIn PDF document text
    • http://moxulolo.pbworks.com/f/ti_nspire_cx_cas_instruction_manual.pdfIn PDF document text
    • http://fogofalo.pbworks.com/f/84276536975.pdfIn PDF document text
    • http://foziwedugumu.pbworks.com/w/file/fetch/144571233/how_to_unclog_dirt_devil_power_max.pdfIn PDF document text
    • http://ruxafonan.pbworks.com/w/file/fetch/144509697/gemenobigezijekonelovi.pdfIn PDF document text
    • http://bovojigu.pbworks.com/w/file/fetch/144425481/wasukevije.pdfIn PDF document text
    • http://mevuteled.pbworks.com/w/file/fetch/144545421/race_to_witch_mountain_full_movie_in_hindi_dubbed_mp4moviez.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/f/john_deere_425_mower_deck_belt_diagram.pdfIn PDF document text
    • http://gazumadu.pbworks.com/f/69916256653.pdfIn PDF document text
    • http://wusagem.pbworks.com/w/file/fetch/144447426/26020802426.pdfIn PDF document text
    • http://nonesupul.pbworks.com/f/five_steps_to_a_five_ap_us_history.pdfIn PDF document text
    • http://togusan.pbworks.com/w/file/fetch/144614766/what_does_numbers_555_mean_spiritually.pdfIn PDF document text
    • http://wuranosa.pbworks.com/w/file/fetch/144414786/cre_notes_form_4.pdfIn PDF document text
    • http://gufabewa.pbworks.com/w/file/fetch/144576189/catia_v5_part_assembly_tutorial.pdfIn PDF document text
    • http://namikikis.pbworks.com/w/file/fetch/144485898/list_of_adjectives_in_english_with_hindi_meaning.pdfIn PDF document text
    • http://namikikis.pbworks.com/w/file/fetch/144507501/kiwi_calories_per_serving.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_off0000decb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECB 5452 bytes
SHA-256: 440a09d8d766d91ec12329b4b9426e7d7fc9c6ecec7ac72e6a7cacbe7be6bafd
font_01_sfnt_off0000f15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15C 10132 bytes
SHA-256: ce6b8b1d732553270a22f8d588fd6ba0e60ac897d21bd44788a4990b894acb33

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