Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d75f70be5b3713…

MALICIOUS

PDF

87.6 KB Created: 2021-02-22 21:32:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ac311b0b1668182d72997a0c51de2583 SHA-1: b0fedf2abd869df723f9eae0238aa972ad41e5e8 SHA-256: 80d75f70be5b37130a4a5f7072700851bc01f51e2650be85afa5e397a0a5f44f
166 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a link farm and a payment redirection lure, suggesting a phishing attempt. Multiple external URLs are embedded, some pointing to disposable hosting, which are commonly used to host malicious content or redirect to phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://bologen.ru/123?utm_term=how+to+get+pebble+watch+to+work PDF link annotation
    • https://cdn.sqhk.co/lesebonun/kYjhA3G/parrot_wallpaper_for_iphone_6.pdfIn PDF document text
    • https://cdn.sqhk.co/labojime/hgQjggd/9_innings_baseball_2016_apk.pdfIn PDF document text
    • http://ninudogexefeg.22web.org/zivine.pdfIn PDF document text
    • http://cmbclientes.com/google_earth_map_apk_downloadfkceu.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/YxTheNd/army_wallpaper_hd_for_phone.pdfIn PDF document text
    • http://registrat.space/lifetime_50_portable_basketball_hoop_bjshed9l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456143/normal_5feb01bdf343a.pdfIn PDF document text
    • http://steelsho1.club/worojuvitebcbxz.pdfIn PDF document text
    • http://bigowet.xyz/992449418973i4uf.pdfIn PDF document text
    • http://3gusevshop.website/jaxoxemtvvpi.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/cgiIgfz/oxygen_levels_covid.pdfIn PDF document text
    • http://detonic-hypertonie.website/adventure_games_download_for_android_phoneia1jq.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://suvowafavij.epizy.com/harvest_moon_story_of_seasons_gift_guide.pdfIn PDF document text
    • http://fudewalazakukug.epizy.com/napegelibamovaxa.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A8 4908 bytes
SHA-256: a3fc7661967527011b422d38a2704f9059576a8d52f57d408f2971e16e92501a
font_01_sfnt_off00010983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10983 10560 bytes
SHA-256: 6d045dc46980ba5cb298b21ef57c6d57c25ad4719ac650ffa8eed5cbb0a4efbd
font_02_sfnt_off00012df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF5 16084 bytes
SHA-256: 40362fbc9d771ad4ffebf23d851d0e608cbe5e910bc9c9578be8a04431091e8d
font_03_sfnt_off000142a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142A2 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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