Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6579d535e514f4…

MALICIOUS

PDF

81.2 KB Created: 2021-02-14 02:32:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 054bf3707584c3432e2c5ca2264ab643 SHA-1: c706c6f9aebbfbdc26fdaf74653da976f4dc6e58 SHA-256: eb6579d535e514f43f02c4035b04a7bcd705617b22eaedcc41335f61df678c32
211 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and lures users with content related to pirated movies and worksheets, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, while containing seemingly benign text, is interspersed with suspicious URLs, reinforcing the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Viral-video clickbait PDF links to suspicious host critical SE_VIRAL_VIDEO_CLICKBAIT_LINK
    Document uses viral/leaked-video lure text and links to a suspicious disposable-looking web host. This is a clickbait/traffic-scam carrier shape rather than a benign PDF link.
  • PDF advertises pirated movie streaming/download medium PDF_PIRACY_STREAMING_LURE
    PDF rendered text advertises free full-movie streaming or download using piracy-brand names or a 'full movie + download/free/watch' intent phrase — recovered after folding the styled Unicode confusables the campaign uses to hide those keywords from plain-text detection. These are disposable SEO-spam carriers that route users to malvertising, fake-player, and scam pages; the PDF itself is inert.
  • 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://seumenha.ru/aws?utm_term=measuring+angles+worksheet+grade+6+pdf PDF link annotation
    • https://cdn.sqhk.co/jolodovi/cIhdOe2/wowuguzizesaxibaf.pdfIn PDF document text
    • http://handler-autoscout24.com/konibosevovozonubot07kb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370780/normal_5fcb6ea989257.pdfIn PDF document text
    • http://gonzo-3d.com/face_changer_video_clip_app_download1w2yz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392474/normal_5ff5665a5ac13.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/34208701686.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/77187389510.pdfIn PDF document text
    • https://dinowupeguf.weebly.com/uploads/1/3/1/3/131379410/7677850.pdfIn PDF document text
    • https://cdn.sqhk.co/fejavegiwo/wGtngfo/fate_of_racing_furious_8_drag.pdfIn PDF document text
    • https://senajadodum.weebly.com/uploads/1/3/1/3/131379015/jodunepasu.pdfIn PDF document text
    • http://ch-data-2a8fv9s.pw/mozilgklau.pdfIn PDF document text
    • http://salleop.xyz/791984748236s55x.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/7100154644.pdfIn PDF document text
    • https://cdn.sqhk.co/belesobikezi/cV6hajc/street_hockey_goalie_pads_youth.pdfIn PDF document text
    • http://aazzzry.space/diamond_mobile_legend_free_tips1bumq.pdfIn PDF document text
    • http://mandarins.space/drive_des_fonctions_exponentielles_et_logarithmiquesyl146.pdfIn PDF document text
    • https://nagipunewemog.weebly.com/uploads/1/3/5/3/135315215/bbd74394034cf27.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/78765960253.pdfIn PDF document text
    • https://cdn.sqhk.co/zosiwutu/chb91jc/51163099910.pdfIn PDF document text
    • https://rereviraret.weebly.com/uploads/1/3/4/5/134512362/8e761737c7877.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000e8bb.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000e8bb.bin)
    • 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 extracted file (font_00_sfnt_off0000e8bb.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off00012213.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off00012213.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BB 5620 bytes
SHA-256: ea4dea10a0ba6c3a2c35eae857853c7975ba805be1824d2b8ed153081303acf1
font_01_sfnt_off0000fbed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBED 11208 bytes
SHA-256: cb1ead38968b89df270a0e3c5f4f70c7761b5792532ec986e1ec71f630157933
font_02_sfnt_off00012213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12213 16072 bytes
SHA-256: 24c5c481937acf4f4841e6563a6d7a18cfdb810806c94b09ac0ff4033348c1e6