Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae8b3e2e737e287…

MALICIOUS

PDF

63.8 KB Created: 2021-02-21 23:53:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c87b1a0d19a03079b7b2769b86c00422 SHA-1: 89186e2d965098c075f7d75bb86d80dd088382f9 SHA-256: 2ae8b3e2e737e28708f916a4fa69e6656ccb553fa812e9dfb200e73a4545d429
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable domains or link farms, indicating a strong intent to redirect users to potentially harmful sites. The presence of external URIs and the 'link farm' heuristic further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=material+science+engineering+lab+manual PDF link annotation
    • https://cdn.sqhk.co/zovifesojeme/6hpjcjh/skate_art_3d.pdfIn PDF document text
    • http://drnextact.xyz/chevy_cobalt_repair_costsesigj.pdfIn PDF document text
    • https://xaxozugine.weebly.com/uploads/1/3/2/3/132303195/getebugofo_bavur.pdfIn PDF document text
    • https://cdn.sqhk.co/bedogipaxog/ZlbOGhj/femisoziba.pdfIn PDF document text
    • http://questotzvezd.space/galaxy_wallpaper_hd_4k_downloadxc5rc.pdfIn PDF document text
    • https://tixovokibena.weebly.com/uploads/1/3/4/1/134109053/duxamem.pdfIn PDF document text
    • https://cdn.sqhk.co/zijikunu/cijjgha/zaluv.pdfIn PDF document text
    • https://cdn.sqhk.co/mozoposowi/gjgihaT/my_flag_boy_song_original.pdfIn PDF document text
    • http://kuvuradivikosef.iblogger.org/11541386676.pdfIn PDF document text
    • https://simisasokudu.weebly.com/uploads/1/3/4/2/134235492/9818020.pdfIn PDF document text
    • https://lejujazu.weebly.com/uploads/1/3/5/3/135337057/de03f0b4.pdfIn PDF document text
    • https://xudekumuf.weebly.com/uploads/1/3/2/6/132681038/fituvibi.pdfIn PDF document text
    • https://vifabuwu.weebly.com/uploads/1/3/1/6/131606679/nepomuvivopenifa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rotitujazolu.rf.gd/sulumilugodiv.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/the_natural_life_coupon_code.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/31507787973.pdfIn PDF document text
    • http://gofirog.epizy.com/audio_naat_free_karam_mangta_hoon.pdfIn PDF document text
    • http://likuxusodim.epizy.com/58889331153.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/battery_saver_pro_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/baxuwanunibame.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_off0000bed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBED0 5264 bytes
SHA-256: 2e1e26f8cf90c93ddae31b26f25cf129d3e44ac768c4a197e0a45b1b48f4a80a
font_01_sfnt_off0000d0aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AA 9704 bytes
SHA-256: 7cd579bdad029f2f4bc7794a9aec2a54e09586bba3076abeb4c8c501bd01ade9

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