Malicious PDF — malware analysis report

Static analysis result for SHA-256 1301d497650d726f…

MALICIOUS

PDF

71.8 KB Created: 2021-05-17 07:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 190be9460ef3d198087f3b1f3d2611b2 SHA-1: 90d0582054440213911f7c832fdcb9653ecfde69 SHA-256: 1301d497650d726f3e71abaf8250d8254d559e2ea60b248686b6d97d9074d7b8
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable hosting and redirect to malicious infrastructure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to 'food service operations'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://crophysi.ru/wb?keyword=what%20are%20the%20types%20of%20food%20service%20operations In PDF document text
    • https://cdn-cms.f-static.net/uploads/4464732/normal_6049d3745f258.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447640/normal_6036c63f849e7.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/84006971237.pdfIn PDF document text
    • https://kamidosebesu.weebly.com/uploads/1/3/4/5/134593467/4528565.pdfIn PDF document text
    • https://piximemob.weebly.com/uploads/1/3/4/3/134371032/5016926.pdfIn PDF document text
    • https://pabarasoziraw.weebly.com/uploads/1/3/5/3/135324669/folopazoxobobig.pdfIn PDF document text
    • https://sivusemekatew.weebly.com/uploads/1/3/4/4/134491367/gukaz.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/rakimavakedok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453719/normal_600a58e4c9a74.pdfIn PDF document text
    • http://vobajujabu.mywebcommunity.org/le_millionnaire_paresseux_marc_fisher.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/araby_james_joyce_sparknotes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465400/normal_602274dc55236.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412887/normal_6058ad963b059.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/166c7711-43bc-430f-a34c-f1a4cc53606a/29475257483.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/41140544515.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/217888ee-8392-4433-b768-444a4a7cb1cc/how_many_times_a_day_should_you_feed_a_miniature_dachshund_puppy.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/savivomekilunosejuzir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/110cb6e4-8456-4f43-8028-4e1865e4289b/jatokoborekapiw.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC05 5388 bytes
SHA-256: 0f9bb87b6e9b2c7729607da47b87c5312dccf5c69ac9276fc3c0d3466650a458
font_01_sfnt_off0000ee6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6C 10412 bytes
SHA-256: 5320ee8426a92e1c2f74a4eb32f37a95059c032c5af84de5016224ec2334be81

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