Malicious PDF — malware analysis report

Static analysis result for SHA-256 debb8e72c2d4c76c…

MALICIOUS

PDF

97.4 KB Created: 2021-03-09 23:10:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d0150aaab0777aa09cf1ff9310658c8 SHA-1: 22c4f7aff4b0862b705b441f4a5328dba57522af SHA-256: debb8e72c2d4c76cd5b123e6ced1e0dcb3d02a410e8ed0c6055283700ea4e69d
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous URLs, many hosted on disposable domains, suggesting a link farm or redirection scheme. The heuristic 'SE_PAYMENT_REDIRECT_LURE' indicates the document likely attempts to trick users into changing payment details, a common tactic in business email compromise attacks. No scripts were extracted, but the presence of external URIs and the nature of the heuristics point towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://pelibifir.ru/123?utm_term=after+effects+templates+online+free
    • https://bovopoboj.weebly.com/uploads/1/3/0/7/130776351/2529417.pdf
    • https://cdn.sqhk.co/kusamika/HaRA1hc/43570433447.pdf
    • http://beteziraz.22web.org/65282865389.pdf
    • https://safapovajedetux.weebly.com/uploads/1/3/4/6/134642125/573676c3b1f5e8.pdf
    • http://huseyincanx.com/spss_amos_23ggm99.pdf
    • http://tihefers.online/how_to_see_google_search_history_without_an_account5po6m.pdf
    • https://vupebuxotilejo.weebly.com/uploads/1/3/0/8/130814562/f657de6c8638cb6.pdf
    • https://cdn-cms.f-static.net/uploads/4421365/normal_6032713d35e0a.pdf
    • http://mevixonur.mywebcommunity.org/advocare_24_day_challenge_book.pdf
    • https://cdn.sqhk.co/lukedivibeb/jijgk4d/happy_birthday_all_song_djpunjab.pdf
    • https://rupusuji.weebly.com/uploads/1/3/4/8/134878943/4c1096c.pdf
    • https://static.s123-cdn-static.com/uploads/4389794/normal_60078dedd747b.pdf
    • http://agencymedia-ig.com/mijofosimipzvccz.pdf
    • http://fupemagis.mywebcommunity.org/98250468294.pdf
    • https://cdn-cms.f-static.net/uploads/4476569/normal_5fe7bf4057311.pdf
    • https://cdn.sqhk.co/gaximeme/Khegcgd/47433666562.pdf
    • https://cdn.sqhk.co/dobexesi/bigeggo/alien_shooter_2_the_legend_pc_gameplay.pdf
    • https://static.s123-cdn-static.com/uploads/4462046/normal_5fe27db71da04.pdf
    • http://vamekujo.66ghz.com/vusubitugekizetakobo.pdf
    • https://fulidozemupure.weebly.com/uploads/1/3/1/3/131384797/5e4b2b.pdf
    • http://clubstore.pro/tabejomekz5039.pdf
    • http://mishabelle.ru/rusty_lake_birthday_guidelynjm.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pabewuvuxaf.onlinewebshop.net/what_does_duty_to_god_mean_cub_scouts.pdf
    • http://zogosugo.onlinewebshop.net/diresejosalebutusavuvaza.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd62.bin
b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD62 6744 bytes
font_01_sfnt_off00010e47.bin
58983981ccfb0dcc9884e30cede97b6d45bb2b1c54bf1d60acb8ebbddef210ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E47 5152 bytes
font_02_sfnt_off00011fb4.bin
e4cb4a7e48e0923957a336bd2de39a972f5beb88e0cef34c7bb7cc8420162a59
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB4 8120 bytes
font_03_sfnt_off000139d2.bin
634c98a6df841e1758ed944883cc844a00766fab8010a4683b1d505671ff1559
pdf-font-stream PDF embedded font (sfnt) at offset 0x139D2 10876 bytes
font_04_sfnt_off00015f35.bin
d9bed15899e423ce3253bb258622bb71fd0d3448d1533e81432f1c24d50ae03e
pdf-font-stream PDF embedded font (sfnt) at offset 0x15F35 16704 bytes