Malicious PDF — malware analysis report

Static analysis result for SHA-256 e804e7a8abfbbfec…

MALICIOUS

PDF

81.9 KB Created: 2021-04-15 02:29:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1be641a7e99c75113fc430b99e9aee05 SHA-1: 54bb8f0ec4a2a0d9fcbacf89727a16b26496df95 SHA-256: e804e7a8abfbbfec4216442949a9dec8d0ca9716b858c150018d422a5bcfc8db
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jottigo.ru/strik?utm_term=how+do+i+record+shows+on+my+dish+hopper PDF link annotation
    • https://defusisiz.weebly.com/uploads/1/3/4/5/134599350/3182042.pdfIn PDF document text
    • https://dotomogef.weebly.com/uploads/1/3/4/7/134760479/7501748.pdfIn PDF document text
    • https://dakawomafi.weebly.com/uploads/1/3/5/9/135959339/4263323.pdfIn PDF document text
    • https://tamoniwezetiro.weebly.com/uploads/1/3/5/9/135961995/5744750.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460708/normal_5fd777ac1f662.pdfIn PDF document text
    • https://lufumapapolag.weebly.com/uploads/1/3/4/3/134353855/texokusavurovu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409000/normal_604e467603c96.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/RfdfUij/lanovesuwuresi.pdfIn PDF document text
    • https://cdn.sqhk.co/tonuviwa/dhfqzjf/tifore.pdfIn PDF document text
    • https://girisuwudogepo.weebly.com/uploads/1/3/0/7/130776006/zogizaroxawo-deboli-dejewapuz-jiwiluzisel.pdfIn PDF document text
    • https://gezajinesobovu.weebly.com/uploads/1/3/2/3/132303035/0ac6628d.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/jeAijiS/bowaduzukemoxuvubalimowi.pdfIn PDF document text
    • https://cdn.sqhk.co/dedizozife/3bhhao4/73554193345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446264/normal_602c35deb81d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444644/normal_5fd91677750d7.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/hhjimTj/nesil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422144/normal_60111a7361012.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://83d7d1d1-3661-4158-a2cc-78aa4aa39d08.filesusr.com/ugd/163759_29736ed183804ec0b3cd5c7315d018e3.pdf?index=trueIn PDF document text
    • https://9f4ad419-87ad-4507-9b23-40b7c7395cc9.filesusr.com/ugd/55478e_9a9c7fdfbb104c8ba9dd8ebc9458d76d.pdf?index=trueIn PDF document text
    • https://c4e42e93-254c-4ba8-b495-737f84002742.filesusr.com/ugd/ddb60a_7cde92d2731e4cf38f6fa54548096b72.pdf?index=trueIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_d2f53311d8c9436aba0aa48a678df3c2.pdf?index=trueIn PDF document text
    • https://4e4301d6-cc9a-4939-960a-6b497c1efea6.filesusr.com/ugd/d78803_a120641a694643d99cf627aad58c819c.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EE 5224 bytes
SHA-256: bc79ac3b7e8d4ed5d0f60671798c6b3dd0e9a9d438609a0254e646e022ecb9ec
font_01_sfnt_off0000fba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA5 11812 bytes
SHA-256: 5e09627c7873de716b737ca81a79ebbc1c4b5be7c8d84dd2eb863f0081a77e3b
font_02_sfnt_off0001231f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231F 16148 bytes
SHA-256: 3fe40d35e17ab1ce57c3898b8081a6c8e4bc1f65f9c98f6f54b9b6762c7d16b9