Malicious PDF — malware analysis report

Static analysis result for SHA-256 2716197e61f6e7ec…

MALICIOUS

PDF

74.3 KB Created: 2021-03-04 16:44:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 1e1792a30885f7308e15937657348dc2 SHA-1: 43d1696c1cf7be4d245ac151d1a01d9d41df8a36 SHA-256: 2716197e61f6e7ecea41629a65887a3937c4bdeb62115bdd9decbaedb853f4ef
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The embedded URLs like 'https://jottigo.ru/wix?keyword=rhonda+jones+realtor' and 'https://wisowoturap.weebly.com/uploads/1/3/1/4/131453432/6dcc84cf8789.pdf' are likely used to redirect users to malicious sites for credential harvesting or further malware delivery.

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://jottigo.ru/wix?keyword=rhonda+jones+realtor PDF link annotation
    • https://wisowoturap.weebly.com/uploads/1/3/1/4/131453432/6dcc84cf8789.pdfIn PDF document text
    • http://walletelectrum.buzz/fekoga3dxy3.pdfIn PDF document text
    • http://optamorem.com/85119353797z9yjz.pdfIn PDF document text
    • https://vujafufitagizej.weebly.com/uploads/1/3/2/6/132696128/finanijeserafazibe.pdfIn PDF document text
    • http://creditstar-kabinet.com/what_symbols_represent_buddhismv4skk.pdfIn PDF document text
    • https://sipovabamekejo.weebly.com/uploads/1/3/5/3/135391609/4291948.pdfIn PDF document text
    • https://pokeboxut.weebly.com/uploads/1/3/1/4/131437348/8988371.pdfIn PDF document text
    • https://jibudodenip.weebly.com/uploads/1/3/4/3/134364722/xipipotukemuwikupize.pdfIn PDF document text
    • https://subegudikowezi.weebly.com/uploads/1/3/4/4/134476363/53536e7bae5.pdfIn PDF document text
    • http://harmony-market.ru/97312477318yh556.pdfIn PDF document text
    • https://bonorira.weebly.com/uploads/1/3/5/3/135346760/f9ef4d83e123e7.pdfIn PDF document text
    • https://xososikanezav.weebly.com/uploads/1/3/4/8/134892973/4198494.pdfIn PDF document text
    • https://xisubuto.weebly.com/uploads/1/3/1/3/131380177/jevineg_pibuzedeb_javelopemomedo.pdfIn PDF document text
    • http://presalle.xyz/trigonometry_identities_for_class_10thujkay.pdfIn PDF document text
    • https://rowisinudusa.weebly.com/uploads/1/3/5/3/135310113/wulolalajek_laligawulixus_ranodemosex_zadefa.pdfIn PDF document text
    • http://morehomeinfo.cIn 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://s3.amazonaws.com/solonebosop/rational_inequality_word_problems_and_answers.pdfIn PDF document text
    • https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_08c171d8ad1f45fca30420f001dda8b2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/momanexobigejafam.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/fesumabetuxiganakizumo.pdfIn PDF document text
    • https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_96f9a2f015934e938647d8301d493fc6.pdf?index=trueIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_34280cd04b3247aaa8afc73a0d0a6181.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sajezife/29247165576.pdfIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_cc8ef04261d24ed5bbe2bb8ed1deeee5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zurovajij/79504055373.pdfIn PDF document text
    • https://add83a7c-0e31-48b3-928b-061d82ba9144.filesusr.com/ugd/205ae4_5523783b21da47ed9937546bc116bcd1.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_off0000dbfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFB 4736 bytes
SHA-256: da050f0a5f4fbca641f043a9ee4c7f70a1b0acacfa4e32b273e4df2e7182db33
font_01_sfnt_off0000ec09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC09 9756 bytes
SHA-256: caa731ea265b7abf6886b089cb14e77bd09d42ecc39018c7c6220907d4acd873
font_02_sfnt_off00010d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D86 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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