Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1b383871f2a3476…

MALICIOUS

PDF

88.9 KB Created: 2021-05-13 12:17:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 44211adf1d9c70c8637424b2cc5a30ae SHA-1: 058b093ffbd0af54923851048840a6a419a2029a SHA-256: c1b383871f2a3476606471d04132ce1d33872103d90c56841f53fb8a1e54b01f
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 0.9951

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
  • 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://xajibur.ru/strik?utm_term=the+divine+conspiracy+epica PDF link annotation
    • https://bijesuvudapij.weebly.com/uploads/1/3/1/8/131860553/bakavezizuselu_gusupagiri_xoxarizizun_zajusoxijezabuv.pdfIn PDF document text
    • https://sanofawuvi.weebly.com/uploads/1/3/4/5/134588151/d2f8bf5c4b94.pdfIn PDF document text
    • https://waluxine.weebly.com/uploads/1/3/4/7/134759732/dijamebupalel_jozamukekaduled_gosovef.pdfIn PDF document text
    • http://vomenelavive.22web.org/bevimisilasusekuvutuxeri.pdfIn PDF document text
    • https://sajipetifejej.weebly.com/uploads/1/3/4/8/134883768/dotupuwejezeze.pdfIn PDF document text
    • https://zitozujenuzudip.weebly.com/uploads/1/3/4/0/134042901/genobidonir_ragurejap_satigaripofa.pdfIn PDF document text
    • https://ledijonag.weebly.com/uploads/1/3/4/6/134689342/5d131314.pdfIn PDF document text
    • http://sebemigon.66ghz.com/xinamemidaxe.pdfIn PDF document text
    • https://meboguvogo.weebly.com/uploads/1/3/1/4/131437667/6357242.pdfIn PDF document text
    • https://jitugexe.weebly.com/uploads/1/3/0/9/130969989/7463036.pdfIn PDF document text
    • https://lamegebepezaris.weebly.com/uploads/1/3/1/4/131438642/baditumogozaj.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://uploads.strikinglycdn.com/files/845bfb5f-23f7-4149-a002-c9e7dc42f2c9/20731727050.pdfIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_a4c7077a0a5e4361b4dfe4b2c52121af.pdf?index=trueIn PDF document text
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_345c09469e324b1b85c6e5832e091abb.pdf?index=trueIn PDF document text
    • https://91e55214-10ad-44cf-a10a-60a9392df58b.filesusr.com/ugd/e1c37d_bb44c4af8e0449c4a108d39cb54060a8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/39302210-4bf7-49c8-bd26-4e398353e8a6/types_of_branching.pdfIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_2ee35685ca10431680cbcea827113f43.pdf?index=trueIn PDF document text
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_0335c7b06e67437caea45009fda170f4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/342bc1c2-7f2b-4bad-b10e-e88e4065d545/basic_english_grammar_tamil_meaning.pdfIn PDF document text
    • https://a49aa754-465e-4bbd-924e-b3d0e7b66bd4.filesusr.com/ugd/81d6a4_a01ce8d6e5694da4850bb96f0b6c82a9.pdf?index=trueIn PDF document text
    • http://gidumelefot.epizy.com/gopomudobid.pdfIn PDF document text
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_29865db137f74751b07fc4bbb01f1c23.pdf?index=trueIn PDF document text
    • http://tomabev.rf.gd/ayyappa_bhajan_songs_telugu_lyrics.pdfIn PDF document text
    • https://f59c0a4d-c104-43ac-8966-a5978cdf1b8c.filesusr.com/ugd/0c1ebd_7c2282e1a8764748b5430e32d77fd013.pdf?index=trueIn PDF document text
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_800634c0a72d4a6da362086bf8b82629.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/643e5431-1619-4de0-b662-a94f8f3c07a9/paradigm_shift_bob_proctor_download.pdfIn PDF document text
    • https://5c2cca0d-3a4e-48b0-93bf-8ac6c0c026cb.filesusr.com/ugd/271e65_cced1ab23e1a4b0fbb7f12c358bc862e.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_off000110e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E0 4948 bytes
SHA-256: b1e4a93ef42664434a7f086c191570e82335c20bf0b16f1e15b93814afd3ff82
font_01_sfnt_off0001219b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219B 11196 bytes
SHA-256: a026273bdadaf63eb372bc409bf08d4762ff3cb18c429d7370e611c5c9814c06
font_02_sfnt_off000147a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147A4 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2