Malicious PDF — malware analysis report

Static analysis result for SHA-256 7507905c222ff2f6…

MALICIOUS

PDF

82.8 KB Created: 2021-03-10 06:25:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e72f61222d38531e65f86067b6b905d6 SHA-1: ba87d114c51c0099150ee5e617d8d334507449d2 SHA-256: 7507905c222ff2f6d109370d42ae24eef7a4fbcceada370133421fd691139f27
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 0.9992

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://baarspo.ru/wix?keyword=after+ever+happy+pdf+anna+todd PDF link annotation
    • https://cdn.sqhk.co/boxadiweteve/0scArbl/62678935487.pdfIn PDF document text
    • https://sefomaxezaniv.weebly.com/uploads/1/3/1/4/131483109/tajoribixuzaw.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/canon_powershot_sx100_is_sd_card.pdfIn PDF document text
    • https://rudabukonavapuk.weebly.com/uploads/1/3/4/0/134016662/3847924.pdfIn PDF document text
    • http://kofojoxake.mygamesonline.org/zizabin.pdfIn PDF document text
    • http://salizurewaki.mypressonline.com/what_are_the_levels_of_organizational_culture.pdfIn PDF document text
    • https://rinotawobuv.weebly.com/uploads/1/3/4/7/134768279/rezupudero-piperaku.pdfIn PDF document text
    • http://zuxuvikewi.sportsontheweb.net/texavawejiwipeko.pdfIn PDF document text
    • https://cdn.sqhk.co/givesaxi/hOq8nia/82903315154.pdfIn PDF document text
    • https://vumenaxusavow.weebly.com/uploads/1/3/4/6/134600171/8605505.pdfIn PDF document text
    • https://nabodavovi.weebly.com/uploads/1/3/1/4/131406515/gedipofuzagogita.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_0e5b1548db2f482cae26eb67d737dd2d.pdf?index=trueIn PDF document text
    • https://a5a8f6e1-24ae-425c-880d-6f4079e3c376.filesusr.com/ugd/035627_06659140c4db43d7a45084301f5ed9e3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/wegizujepififedali.pdfIn PDF document text
    • https://d7b50aa0-fea3-4edc-ba9e-4ed0094b0c60.filesusr.com/ugd/7f614e_2243dbcd7f654978aad89e8a513500c0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/tudisixido.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/46539819351.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/32860104846.pdfIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_735fd1d195c749898d6c0d3af6ad1f17.pdf?index=trueIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_821aa17802b7408199d92d3425f79280.pdf?index=trueIn PDF document text
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_c87ba9f332b44059be4a2661c92296a7.pdf?index=trueIn PDF document text
    • https://d992f69e-bc5b-430a-92d7-abfd66d0380b.filesusr.com/ugd/6f7357_42b633e8025d44eeb28daeb0920f6be8.pdf?index=trueIn PDF document text
    • https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_2ff96bc0d4bc4147b13a34e9559f03b4.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C3 5072 bytes
SHA-256: 63f749de8bd87b5384c34b63c05c31b0558383884ee2d110c1595286f64156e5
font_01_sfnt_off0001030f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030F 10124 bytes
SHA-256: 2b0c754321b85a498f5a79b713a0daea219b81f09469486dd99df4713bfb5184
font_02_sfnt_off000125e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E0 16436 bytes
SHA-256: 9c79a14db12229fed266818823527cc7cf6c818d7a6200f319a3d2922253fa23

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