Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b68f0c17bd395c…

MALICIOUS

PDF

83.7 KB Created: 2021-05-16 11:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f7137b55216995f8ba5806949a54d98c SHA-1: 1471be0bdffff140774f1340af498763222e73d6 SHA-256: a7b68f0c17bd395cb1da585e8aa983dd8fc041f60972fa85f819b77afba2df28
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which point to disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The embedded URLs and the heuristic findings of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM support this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://dugedepap.ru/strik?utm_term=nonton+fifty+shades+freed+bahasa+indonesia PDF link annotation
    • http://gugezebaz.mygamesonline.org/blue_eyes_technology_ieee_paper.pdfIn PDF document text
    • http://rivepozepuxar.mywebcommunity.org/9526369463.pdfIn PDF document text
    • http://fadulifakibul.medianewsonline.com/an_occurrence_at_owl_creek_bridge_text.pdfIn PDF document text
    • http://liberum.sportsontheweb.net/iso_9001_version_2015_clauses.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/96968287994.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://df1d5e35-4e67-4e57-ba41-6141a32c4ecb.filesusr.com/ugd/c54278_03034c2d5fe64a3ebf86dcf522731399.pdf?index=trueIn PDF document text
    • https://fb5b3b17-6e6a-47c5-ae49-26eddba71e57.filesusr.com/ugd/aff7be_1088a3b69b49422a867fbe8cbe57332b.pdf?index=trueIn PDF document text
    • https://40052bae-d6b0-4be3-9c84-96956a804c69.filesusr.com/ugd/32907c_24525a0465c643a187c7d4c1fcc66759.pdf?index=trueIn PDF document text
    • https://d650f791-4ca6-4964-96f1-ba9fac0414c1.filesusr.com/ugd/adf9cb_f9b939b4aeef4744acd941859ca03059.pdf?index=trueIn PDF document text
    • https://95c758d6-fd33-43c6-b5d0-f1f55e07e946.filesusr.com/ugd/cb0188_79a83304a38442c4bfb0b48048eaf8c3.pdf?index=trueIn PDF document text
    • https://38f9ccf9-db33-4582-994d-0ea518e52d38.filesusr.com/ugd/368de4_c5342e55568d4a858711264c6d37aec0.pdf?index=trueIn PDF document text
    • https://a3720f92-bdaa-4449-a3ff-14f36884d2d5.filesusr.com/ugd/afadc3_e4ac78f109ac4b4ab4feaf7a0c00e818.pdf?index=trueIn PDF document text
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_ffd826cf4abd44aab255e60a1b2c7c5c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9602e31-d1ef-4355-abb2-ce04d75732ab/97375403024.pdfIn PDF document text
    • https://c809e8a6-5bdf-489d-8d8c-df4e4638a115.filesusr.com/ugd/45a296_5d62b1f24c154e06a97b1896a34ca2f8.pdf?index=trueIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_3f40b4b8445844e8ad0c512036f3499f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbbb6aae-bd7d-4b16-8e7c-1e06c5d52b2b/how_many_calories_in_a_venti_matcha_latte_with_almond_milk.pdfIn PDF document text
    • https://c5c27394-2042-4749-9b39-d1c24dcbd9f0.filesusr.com/ugd/e9b987_0c40aecfe7a543a6bd41c9cf6e171482.pdf?index=trueIn PDF document text
    • https://1b6fbac1-9b66-4609-9151-81f5d4c316f7.filesusr.com/ugd/5e81b9_886837df82af4d639acedefbc2ac22e1.pdf?index=trueIn PDF document text
    • https://63d876aa-455f-4c41-9c38-50747f3e0b95.filesusr.com/ugd/a220d5_23bbf7ef02d949bfae858603c2560a7a.pdf?index=trueIn PDF document text
    • https://d128792e-e0a8-46e0-98ed-b941f5da69b2.filesusr.com/ugd/b98abb_2584dac064db4ac0bfea3695ab16df56.pdf?index=trueIn PDF document text
    • https://856cb5e6-6c81-45ce-9604-b57907a15cd2.filesusr.com/ugd/cc3ca9_5a1d6b6f8881411d8b3c575148389600.pdf?index=trueIn PDF document text
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_33f76ee0c592435b86fe5698f9fc03ab.pdf?index=trueIn PDF document text
    • https://8319d365-0190-44ee-b2f3-e76f6fd230eb.filesusr.com/ugd/112488_8d8cdec0209842feac37e0d60ce57a64.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB07 4964 bytes
SHA-256: 4078c7375d209c908235f9ba3c8b7a1a24ed326c7db8ef10cde626ff20f12947
font_01_sfnt_off00010be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE5 11548 bytes
SHA-256: 9e3c55d6008054d45775f6f827157d519587df10fb4a22faa35303b45119489d
font_02_sfnt_off000132dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132DC 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.