Malicious PDF — malware analysis report

Static analysis result for SHA-256 e053b049b44e5242…

MALICIOUS

PDF

74.4 KB Created: 2021-06-02 06:11:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 791e43ff1d5c13b1035adf20c150e1c1 SHA-1: fec1eaa37e8f17cdd0f751b2b21966c12ba0944b SHA-256: e053b049b44e5242f73f01b37ed70782d5b5551527e8b1e89ba852709cdad4d4
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/pbw?utm_term=exercices+les+familles+de+mots+cm2+pdf PDF link annotation
    • https://wuzakuxiletidu.weebly.com/uploads/1/3/4/3/134322166/sunowotiw-fakesugimon-vilewub.pdfIn PDF document text
    • https://zinenefubodejig.weebly.com/uploads/1/3/4/3/134338026/8ee6816f6891a9.pdfIn PDF document text
    • https://lirodute.weebly.com/uploads/1/3/1/8/131871659/72313.pdfIn PDF document text
    • https://kapofered.weebly.com/uploads/1/3/2/6/132680839/1540461.pdfIn PDF document text
    • https://xemivigezeb.weebly.com/uploads/1/3/4/4/134481563/mikamizun.pdfIn PDF document text
    • https://wipabobape.weebly.com/uploads/1/3/5/9/135985954/tovogudarujemuvi.pdfIn PDF document text
    • https://logazimakopaw.weebly.com/uploads/1/3/4/3/134399250/zesarovi-rafuwobipi.pdfIn PDF document text
    • https://lamonide.weebly.com/uploads/1/3/4/0/134096931/xixidutu.pdfIn PDF document text
    • https://nopifabuda.weebly.com/uploads/1/3/4/6/134693299/rixuzumo.pdfIn PDF document text
    • https://jugizefabugej.weebly.com/uploads/1/3/4/3/134377355/vatigopiwuko_boxisapaligadub_zumaki.pdfIn PDF document text
    • https://tuxuboninivufos.weebly.com/uploads/1/3/4/4/134478209/4768262.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/75856ec0-0dbc-4f58-84af-8805f0d0e3b3/what_are_the_components_of_report.pdfIn PDF document text
    • http://wixugigir.pbworks.com/f/how_to_check_lic_maturity_value.pdfIn PDF document text
    • http://viluxese.pbworks.com/f/31474290593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d84e894-8047-4333-b353-c43604fff761/zazoxugepidomunu.pdfIn PDF document text
    • http://sizolasipape.pbworks.com/w/file/fetch/144422958/povutonenavuxutip.pdfIn PDF document text
    • http://jutifakukap.pbworks.com/f/9408441218.pdfIn PDF document text
    • http://ziduzobif.pbworks.com/f/what_can_i_eat_on_keto_printable_list.pdfIn PDF document text
    • http://zufiwuz.pbworks.com/f/rewosoramujeko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ed6b6d0-55ee-4383-8f06-bc52460b98e5/properties_of_water_virtual_lab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e59298df-5714-4bec-8c8a-957bbe79774c/85683708728.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_off0000d566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD566 5140 bytes
SHA-256: 693e580cb42623991770e6b1679f13e038acc3176f8b8d54be1ff080231577f3
font_01_sfnt_off0000e6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E9 11536 bytes
SHA-256: f4519fff575e062c7a1663559dc1ab3a0a8d151a22d19ec6cc36496f222ab91b
font_02_sfnt_off00010c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C46 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71