Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec4d128ca61b16cb…

MALICIOUS

PDF

81.5 KB Created: 2021-02-13 13:04:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 8d15a95fee654255a4cc36ed6744cc80 SHA-1: 49a8fa3267ac74ac26f2c01c5bac0d5e661c5481 SHA-256: ec4d128ca61b16cbde04529ada2f909404256feb46e90c00e2855c4b0c8abd0e
244 Risk Score

Malware Insights

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

This PDF file functions as a link farm, containing numerous embedded URLs that lead to external websites. One of these URLs, 'https://yafferge.ru/aws?utm_term=android+mobile+phone+below+15000', is identified as a malicious redirector, indicating a phishing or malware distribution attempt. The presence of many links on disposable hosting further supports a malicious intent, likely to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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.
  • 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/aws?utm_term=android+mobile+phone+below+15000 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4369141/normal_5ff67942cd101.pdfIn PDF document text
    • https://cdn.sqhk.co/muluxodipoto/fgcibMB/37844295412.pdfIn PDF document text
    • https://vesifumami.weebly.com/uploads/1/3/5/2/135294942/5902298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485942/normal_5fd7206390b65.pdfIn PDF document text
    • https://cdn.sqhk.co/jogujufuza/fgckigi/82621189478.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414501/normal_601f77029e5fb.pdfIn PDF document text
    • https://cdn.sqhk.co/kulabokirow/caUjaLL/vuxowuxujamajubexa.pdfIn PDF document text
    • https://cdn.sqhk.co/kixowijeka/uhehhzz/jugar_twilight_struggle_online.pdfIn PDF document text
    • https://fuzimisadu.weebly.com/uploads/1/3/5/3/135319831/mituxori.pdfIn PDF document text
    • https://cdn.sqhk.co/davusegeb/gjOaKBW/61563719607.pdfIn PDF document text
    • https://cdn.sqhk.co/lamajemomu/VCLShcu/mejopabas.pdfIn PDF document text
    • https://cdn.sqhk.co/pemoxeriko/ahchb98/3d_planets_wallpaper_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/difanemifal/gihjijd/96430156476.pdfIn PDF document text
    • https://rominekajamarol.weebly.com/uploads/1/3/4/0/134040464/folaribalezafaja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457332/normal_600e86f64ef6a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dufazovuko.epizy.com/54738999160.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/polaris_blue_encount_piano_sheet_music.pdfIn PDF document text
    • http://tuxizosog.rf.gd/php_ajax_email_contact_form.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/mission_mangal_full_movie_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/assam_police_recruitment_2018_admit_card.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_off0001014f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014F 5348 bytes
SHA-256: 8b7fd16efb935409b06003143f22e40c5243fa0f4e7ffc83dea3b726e231e0de
font_01_sfnt_off00011369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11369 10876 bytes
SHA-256: 396259c9b45ef3b22f8d5e328405eb708d017c76ee0265eac40b1b9e67e086dc

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