Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dd6a286f190aaf4…

MALICIOUS

PDF

67.4 KB Created: 2021-03-14 17:54:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c00cd5095784be4fc86253ea37b81ac5 SHA-1: 33346ccac6c9eb94c757c3860c78aeb3d50348c2 SHA-256: 4dd6a286f190aaf4beaa5f7d623cff74d38adefd4bd4db363e3ceca6ef6e6c2e
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, identified as a link farm, directing users to potentially malicious websites. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a link to 'yafferge.ru', indicating a redirector to malicious infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/wix?keyword=kia+parts+manual
    • https://cdn.sqhk.co/moxoxitij/KG5hhLb/sivunebitoxumas.pdf
    • http://the-english-temple.com/dotuxejilejuwaguxdj7l.pdf
    • https://faruxolumapegi.weebly.com/uploads/1/3/5/3/135341403/2097761.pdf
    • http://natiral.space/screen_recorder_app_for_windows_10_with_audiow446l.pdf
    • https://visopitolunew.weebly.com/uploads/1/3/1/4/131483219/toziloxixifop-fuwijudefugala-dapajize.pdf
    • https://xoselupovogim.weebly.com/uploads/1/3/4/6/134610719/8964501.pdf
    • https://cdn.sqhk.co/fipimomozuk/c6hbvgX/23002362613.pdf
    • https://cdn.sqhk.co/xalesikozip/fSihzba/catharanthus_roseus_medicinal_uses.pdf
    • https://niloberu.weebly.com/uploads/1/3/0/7/130739427/xutafujunokikid.pdf
    • https://woxukobu.weebly.com/uploads/1/3/4/3/134392577/8e6e92a13f5bb.pdf
    • https://rogapunuki.weebly.com/uploads/1/3/4/3/134375427/1669681.pdf
    • https://likudone.weebly.com/uploads/1/3/4/6/134681098/fisokafu_towebemitojo.pdf
    • http://merovew.xyz/monthly_expense_tracking_excel_templatenq8kx.pdf
    • https://dojapoxozali.weebly.com/uploads/1/3/0/7/130775013/bbb1ddc5ea.pdf
    • https://luxederobidurip.weebly.com/uploads/1/3/4/6/134603039/pobojuk.pdf
    • https://cdn.sqhk.co/wajerewuwer/dJsoVia/toy_story_drop_level_55.pdf
    • https://bodonoweti.weebly.com/uploads/1/3/1/8/131856710/kunetanosiso-dezoni-jezotoxawajamoz-xisalanado.pdf
    • https://cdn.sqhk.co/kerikone/q2ijhaR/bubble_tea_emoji_copy_and_paste.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dazuxujepov/bharathi_movie_songs_masstamilan.pdf
    • https://s3.amazonaws.com/zesotat/true_caller_id_app_free.pdf
    • https://s3.amazonaws.com/jolozidabi/concierto_de_aranjuez_guitar_and_piano.pdf
    • https://s3.amazonaws.com/sajatofubote/gujarixanaduleb.pdf
    • https://s3.amazonaws.com/fedure/wefefefu.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cded.bin
21cbc044560daa41839eec5f499e85f9cbd23b71ee60279216192c6896b48611		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDED 4936 bytes
font_01_sfnt_off0000dea2.bin
d734efcb41dcd133a06edccbd0a8c8ae04aecc2b79db65aff24bc5acb0e8576a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA2 9956 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.