Malicious PDF — malware analysis report

Static analysis result for SHA-256 132e8db07a416181…

MALICIOUS

PDF

66.5 KB Created: 2021-04-04 18:22:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 502071818980bd87e612238336f24911 SHA-1: 7f23b86685d75a3cb634e11a73bf180f29dcf2f8 SHA-256: 132e8db07a4161814a286081a51b634a4804da7e14fbe1a428b9cc0cec1f1915
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to manipulate search engine results or host phishing content. The ClamAV detection and ML classifier strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or SEO spam campaign.

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://soxebez.ru/aws?utm_term=the+paper+trip+3+pdf PDF link annotation
    • https://koloxajemixe.weebly.com/uploads/1/3/1/4/131482821/1376199.pdfIn PDF document text
    • https://sumudopijo.weebly.com/uploads/1/3/4/7/134716274/sutavapilalox.pdfIn PDF document text
    • http://rijebipimaba.getenjoyment.net/application_for_canadian_citizenship_adults.pdfIn PDF document text
    • http://ekzo-fruit.ru/bamonetufuir878.pdfIn PDF document text
    • http://site-shop.xyz/xenititowufumovibasabpfx64.pdfIn PDF document text
    • http://polikarmonolit.ru/zawofekaoi6ar.pdfIn PDF document text
    • http://kinatoguvekajux.22web.org/2015_honda_civic_secret_menu.pdfIn PDF document text
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/c29d9293d648da8.pdfIn PDF document text
    • http://jebifawulu.mywebcommunity.org/5659214994.pdfIn PDF document text
    • https://newogofifexepe.weebly.com/uploads/1/3/4/8/134884114/84ecf0a843a3.pdfIn PDF document text
    • https://pogudemuzam.weebly.com/uploads/1/3/4/0/134018755/dagijazavubowor-totojes.pdfIn PDF document text
    • https://jelozenodi.weebly.com/uploads/1/3/0/7/130739120/e18aba4af.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/zapuz.pdfIn PDF document text
    • https://litepuvib.weebly.com/uploads/1/3/4/7/134741427/2944442.pdfIn PDF document text
    • http://saporik.scienceontheweb.net/53216837047.pdfIn PDF document text
    • http://brumbum3.xyz/is_uppababy_bassinet_safe_for_overnight_sleepingpi0kh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_6069c227b37e4d85a551ffbeaba84604.pdf?index=trueIn PDF document text
    • http://vupifokixen.rf.gd/subinefibiket.pdfIn PDF document text
    • https://ab9101c8-a046-40a0-ba79-761bab9f3367.filesusr.com/ugd/61fb7c_4b5db18ad9de4527b593b3b61ee4a2f0.pdf?index=trueIn PDF document text
    • https://a82c121c-2200-4cd7-aff6-47cf910fdadb.filesusr.com/ugd/117c17_e16b2756abaa4a0b889dc277e1d3b8b6.pdf?index=trueIn PDF document text
    • https://d3826037-6016-486c-99e9-dc41bc666644.filesusr.com/ugd/b81754_15e5cc1dd4b34ce9b565689214606a43.pdf?index=trueIn PDF document text
    • https://ba30dffa-51fe-4caa-9472-6f142403a9bb.filesusr.com/ugd/c2007e_698029fa35e3456e8597b4cbcbd95042.pdf?index=trueIn 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_off0000c6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A6 5032 bytes
SHA-256: 920262dd29cb688b05e226ed9cfb41b850ec1001e9014b7eec50ca7fcbb8eb6a
font_01_sfnt_off0000d7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BF 10236 bytes
SHA-256: 43f49d512240008f07ed814640be96a03e3aa0f2e21061ebd688b88ff79f4726