Malicious PDF — malware analysis report

Static analysis result for SHA-256 a72eb90b821f6a68…

MALICIOUS

PDF

90.8 KB Created: 2021-04-07 10:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a757dbda71caf7e21c20dd16c41e4cca SHA-1: 2d6278e9e1413fc467121f3d63fd579e0286cdd1 SHA-256: a72eb90b821f6a68a5471ec5538cbd3bcdcf1c074cf079626fbeaa9c11d7357c
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 0.9967

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://maypoin.ru/123?utm_term=school+drrm+contingency+plan+template PDF link annotation
    • http://topcreditreport.info/laporarizexafugaduao15i.pdfIn PDF document text
    • https://cdn.sqhk.co/gixezovof/70piiQE/get_lucky_mark_knopfler_guitar_chords.pdfIn PDF document text
    • http://vash-fasad.live/520528191288usz.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/hdUGeda/live_traffic_five_islands_road.pdfIn PDF document text
    • https://cdn.sqhk.co/surodamiz/Nhfjfgh/crazy_racing_multiplayer_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/fjbqWhf/98020903047.pdfIn PDF document text
    • http://gatorama.space/46480818954u6hr.pdfIn PDF document text
    • https://cdn.sqhk.co/zupitefa/gjhhjo0/labyrinthine_fistula_treatment.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_6011e26442acf.pdfIn PDF document text
    • http://ronojalad.22web.org/detudozopo.pdfIn PDF document text
    • http://goodshopsales.xyz/dd_random_adventure_generatorqf2xu.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/ifGhgDi/okay_meme_gif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447640/normal_603f89d65c740.pdfIn PDF document text
    • https://cdn.sqhk.co/tolononof/9IPhiB4/piano_magic_tiles_pop_music_3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485813/normal_60377bb8401e7.pdfIn PDF document text
    • http://kowojogu.iblogger.org/lomakitabemu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456671/normal_606d0edb81414.pdfIn PDF document text
    • https://cdn.sqhk.co/ketadasogob/phiUeux/26703353557.pdfIn PDF document text
    • https://cdn.sqhk.co/lesepivir/2Zhgisf/fonifizisex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447093/normal_60548c025fc29.pdfIn PDF document text
    • https://cdn.sqhk.co/dogovonediwa/UhhjbnE/junofununorexosefesubajim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://koburolamugalo.rf.gd/62611756944.pdfIn PDF document text
    • http://sutejapikomi.epizy.com/gufegibenod.pdfIn PDF document text
    • http://guminol.epizy.com/10879955984.pdfIn PDF document text
    • http://jonapepubenej.epizy.com/credit_suisse_global_wealth_report_2016.pdfIn PDF document text
    • http://jedajokojar.epizy.com/whats_the_moral_of_the_three_little_pigs.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_off00012200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12200 5516 bytes
SHA-256: e126690e582e24d0e9e7e02ce115462e939426ae23b4367121afe8cec9d1b37e
font_01_sfnt_off0001349c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1349C 11692 bytes
SHA-256: 9d6a047d74d72225a746a609bd851a68a2ed23e8d456eed078ca9175f3dc6d46

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