Malicious PDF — malware analysis report

Static analysis result for SHA-256 a65df9dec413b330…

MALICIOUS

PDF

70.3 KB Created: 2021-02-24 16:23:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: ed943f4dcb3eb34fa4f8854395dd1726 SHA-1: 619ea3a16d12a0af529d741f57c88e48b987ef77 SHA-256: a65df9dec413b3302aa1352642f6831fc24a4b60dedec5cbdd8ebd94da280a8c
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=babe+ruth+farewell+speech+baseball+card In PDF document text
    • http://gosufogirepejam.22web.org/23691289905.pdfIn PDF document text
    • http://lulikike.iblogger.org/42852262843.pdfIn PDF document text
    • https://tibijipobarak.weebly.com/uploads/1/3/4/4/134493900/wisojomem.pdfIn PDF document text
    • https://cdn.sqhk.co/wemojezuvegi/h9jagc0/comic_life_3_crack_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/bebuvasipen/hhh21hd/shogun_book_tv_series.pdfIn PDF document text
    • https://ramemegu.weebly.com/uploads/1/3/1/3/131383760/279449.pdfIn PDF document text
    • https://mobisikude.weebly.com/uploads/1/3/1/6/131606420/ludatadevovapex.pdfIn PDF document text
    • http://menudajuweka.22web.org/86339306889.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/7HKDOfb/33993771079.pdfIn PDF document text
    • https://cdn.sqhk.co/xawemubimaj/aNgeje0/nirivez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://velumosak.epizy.com/bigoruxase.pdfIn PDF document text
    • http://xojozefobulujox.epizy.com/gipoza.pdfIn PDF document text
    • http://jajabidabewaw.rf.gd/23400226110.pdfIn PDF document text
    • http://kogisovaf.epizy.com/cancer_no_microcitico_de_pulmon.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/multiple_barcode_generator_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC989 2960 bytes
SHA-256: 4253ce374f546ed82c0b962bfad5e193173c5af7311640f7068ccdda2cb38311
font_01_sfnt_off0000d40a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40A 5524 bytes
SHA-256: 66318bc04bf7be294eadca6ff414fc366c968eae5095c50a48c24d1ad6c83458
font_02_sfnt_off0000e6e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E0 10660 bytes
SHA-256: f731f088be7a9eab9489f7257007f3725bce1fe8e670af551edb81245f70b1f2