Malicious PDF — malware analysis report

Static analysis result for SHA-256 d050d04c1330a8cb…

MALICIOUS

PDF

78.6 KB Created: 2021-05-08 16:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c8145f1bf1b533238b65fc219e4c27eb SHA-1: d4ea4491f8dedf426735f109abcd5bb25a656286 SHA-256: d050d04c1330a8cb33960d15c77fd4d6f90bca9d63e765b562d165c8513282c6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://ponafet.ru/strik?utm_term=does+the+electric+mustang+have+4+doors PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446275/normal_606e3750ab7b2.pdfIn PDF document text
    • https://bomuwokobija.weebly.com/uploads/1/3/4/0/134041081/wozemuzaruwo-jezomobexurato-vuxavozoke-xopijejepasodo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481675/normal_5fe5002638309.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417023/normal_60506354b9cb9.pdfIn PDF document text
    • https://xufolonul.weebly.com/uploads/1/3/2/6/132695880/difewilig_xulonepifido.pdfIn PDF document text
    • https://fufiwixafuwisu.weebly.com/uploads/1/3/4/7/134770326/fonugejuk-fopuz-xipalopawi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371267/normal_6007abb8f0cbb.pdfIn PDF document text
    • http://gagitevanonuti.mywebcommunity.org/rakexomazi.pdfIn PDF document text
    • http://dipazekonowa.mypressonline.com/bloodlines_2_richelle_mead.pdfIn PDF document text
    • https://rudusixan.weebly.com/uploads/1/3/0/7/130775573/1356280.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/textbook_of_diagnostic_microbiology_5th_edition_free_download.pdfIn PDF document text
    • https://rubusabulolow.weebly.com/uploads/1/3/5/3/135326577/koxuwuxunozawujigo.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/b36968e1-cc70-4bf1-9ad5-ccf582e10658/52967043017.pdfIn PDF document text
    • https://a146b927-ed54-472d-b3a8-6b137e313b92.filesusr.com/ugd/4d400c_ed2b345f7a8a4deeb3f588272e141dc7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a963dbd-fbd4-4a3c-91d7-a22d0076b85d/how_to_read_ecg_report_easily.pdfIn PDF document text
    • https://c07b3cb0-7d4a-4e65-9c62-eb3bd0ce3b6b.filesusr.com/ugd/7560d5_d47ff6cffaa647afb2d9699043d73286.pdf?index=trueIn PDF document text
    • https://1df32be7-5e6a-491e-80e4-5c558052ef26.filesusr.com/ugd/e02e08_e82ac48cc5514f46a659239beb586f53.pdf?index=trueIn PDF document text
    • https://cd29ef07-728f-4a0b-b57b-23e770395c36.filesusr.com/ugd/f14cf6_72f8e5926f2846e5923daa8a8d324faf.pdf?index=trueIn PDF document text
    • https://a72a44ae-2aae-4d6a-a6c4-235301d0a62e.filesusr.com/ugd/57436b_32be74bb4e3f4f9b82d814a6f2a006cd.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_off0000f617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF617 5500 bytes
SHA-256: ccb06d028ce3f6a08735200bed410ab43d5e68c8073467c51cfd623c6b43699d
font_01_sfnt_off000108b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B1 10764 bytes
SHA-256: 07afc4f8970d2c147480d5818794ab35bb003e97e12cf1c33d53c76debe14da6

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