Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e95b62956fad940…

MALICIOUS

PDF

90.9 KB Created: 2021-05-29 19:06:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d20a6ca28bd404128d52ce6b0bcf80e6 SHA-1: df00b92b1c78bedaad65fb634c12f0f34d3451c3 SHA-256: 8e95b62956fad9405a2ffc0a3b636a9f6538837ed729d1222d3937a175912fb0
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 0.9989

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=pronombres+personales+del+italiano PDF link annotation
    • https://noduxulab.weebly.com/uploads/1/3/4/9/134901810/789805.pdfIn PDF document text
    • https://toxofeleziwogiz.weebly.com/uploads/1/3/1/4/131406173/2472208.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451210/normal_6067ba753078f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469638/normal_5feaf9a2574c2.pdfIn PDF document text
    • https://dusonomikeka.weebly.com/uploads/1/3/2/6/132695238/bd34c8b3628.pdfIn PDF document text
    • https://duvinibekumexeg.weebly.com/uploads/1/3/4/6/134677329/kadixu-milirimajofe-kobiresadugeti.pdfIn PDF document text
    • https://mitemulesebiped.weebly.com/uploads/1/3/4/4/134479511/fefujaxedinu_xibaduwowopaxez.pdfIn PDF document text
    • https://miwovobapenatoj.weebly.com/uploads/1/3/4/2/134266375/nubaribozow_gobum_bufuke_kuxalajoxamar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495837/normal_6032a5ea34aab.pdfIn PDF document text
    • https://nubeboganiroj.weebly.com/uploads/1/3/1/3/131384383/3706809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467017/normal_6020fb013dbe6.pdfIn PDF document text
    • https://baresifesej.weebly.com/uploads/1/3/4/1/134131831/e60107.pdfIn PDF document text
    • https://nazoxuja.weebly.com/uploads/1/3/2/8/132814973/sapibojepumujexorep.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/34657050-f986-45d5-9fdb-0f4d091fc8b3/xinujofenukinumesapoba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/716c3341-359f-432a-8a85-758fec4e1510/tovizifoti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b9f85b-7325-4571-8901-36d9fa37e91e/fudaturuwoxazurupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bb2d724-97f5-4b7f-8074-daa130c920b5/singer_touch_and_sew_bobbin_not_turning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf2ff29a-86c5-4ae0-9db8-3a9c54d49249/jogonosazifiretasoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e2a033c-88f2-4c1e-8adc-8d48a8f200e5/xenunisopafulixon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/150b4cdd-35cb-462d-b130-dbdc3e6003be/reference_code_s0600_spectrum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7203fb2f-9db9-43ea-a3cd-55db96ff7550/what_flavor_iced_lattes_does_dunkin_donuts_have.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB95 6740 bytes
SHA-256: 63918f0495d5863976c8752c90d95c56f1c073747ef567a031544105186753d7
font_01_sfnt_off0000fc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6D 5248 bytes
SHA-256: d4fefd671a11874838ab83199b0200f2b13669fbec807e68be46bb97934cd0a4
font_02_sfnt_off00010e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E16 1852 bytes
SHA-256: 2f37f16b6bf7d6261b70497e0219ec0d0f0600cf4123d7bd35884688de9e4df2
font_03_sfnt_off00011728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11728 12400 bytes
SHA-256: f4ea33a3327862efc5055292afeeb8bce70966eb8529eeb6ebc39fc3de784013
font_04_sfnt_off00013f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F08 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7
font_05_sfnt_off0001538f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1538F 1736 bytes
SHA-256: 0d9b6ab0354368cdfa5a4e52e4dfb250ede80cec4283e48fafec0a3c1c1d30df

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