Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aeb0e1628d2047a…

MALICIOUS

PDF

102.5 KB Created: 2021-02-21 00:23:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0219de724ac12101a444bf443d6e62aa SHA-1: b6f2484a112d9b4750287673fbeeeaa5f4608823 SHA-256: 2aeb0e1628d2047a8d4c8c8241925ede5771db8ffd661a4dc59bff769be74825
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable or dynamic DNS domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://baarspo.ru/wix?keyword=saving+capitalism+worksheet+answer+key PDF link annotation
    • https://cdn.sqhk.co/kululojilo/yjfeECM/ikea_brimnes_cabinet_with_glass_doors.pdfIn PDF document text
    • https://jezaxinadi.weebly.com/uploads/1/3/4/5/134597346/libetimafu-givibu-lasuge-pebolila.pdfIn PDF document text
    • https://lejegibovijidup.weebly.com/uploads/1/3/1/4/131438293/gimagotixew.pdfIn PDF document text
    • https://nipetetoxijekuj.weebly.com/uploads/1/3/4/7/134718304/251511.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/guragajakum_sotovikev.pdfIn PDF document text
    • https://dolibaradodusop.weebly.com/uploads/1/3/4/5/134595809/pibalig.pdfIn PDF document text
    • https://cdn.sqhk.co/balekunu/jcDhbhc/46463931073.pdfIn PDF document text
    • https://xovewelokajefi.weebly.com/uploads/1/3/4/8/134864882/76dd6.pdfIn PDF document text
    • https://vefajuvajodal.weebly.com/uploads/1/3/6/0/136094574/6478944.pdfIn PDF document text
    • https://cdn.sqhk.co/bajipugotox/cgc1Dhh/jitiwim.pdfIn PDF document text
    • https://kikoxelila.weebly.com/uploads/1/3/4/3/134335894/1129104.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sabolobu.epizy.com/pap_smear_screening_guidelines_singapore.pdfIn PDF document text
    • http://lokimutopilar.epizy.com/97570321437.pdfIn PDF document text
    • http://boraxatisota.rf.gd/galipudonotezule.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/29879790358.pdfIn PDF document text
    • http://pikumupibo.epizy.com/79753112868.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/ember_spirit_guide_dotabuff.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/pusafozuviwomawaraganaje.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/2015263346.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000123bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123BB 4472 bytes
SHA-256: 3478879181ae419401212c6cb4bb9e92a04012bbc596d1c60bd4af221bbcedab
font_01_sfnt_off00013376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13376 5768 bytes
SHA-256: 52b7c79687fc846722b67b4a6e96e8964ef25fdccdcb5938ff0a986e1bc4194a
font_02_sfnt_off00014711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14711 13196 bytes
SHA-256: ce70a3c44c8cf5de5e57b4c3cf7c8df180bc8885c829a9f4c416a1b2f8ade8f9
font_03_sfnt_off0001734e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1734E 16520 bytes
SHA-256: 40c1406155ae1f38d9600b6f2f6197e3acfd2ef49a128f54fb1c145d6fdb2c4a