Malicious PDF — malware analysis report

Static analysis result for SHA-256 313252a2096a13ad…

MALICIOUS

PDF

84.3 KB Created: 2021-05-16 14:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 75004da6135f5bfa6673053b795aa969 SHA-1: 89e755b9eeeefc2d85b915e77de9bdac83d94eff SHA-256: 313252a2096a13ad902b1da53d94aec7099dab5bd13249cbacd9d4fb99f657c7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to S3 buckets and other domains, indicative of a link farm or SEO manipulation tactic. The primary URL, 'https://gimoguvi.ru/strik?utm_term=what+can+i+make+with+grape+jelly', suggests a lure to a malicious site. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://gimoguvi.ru/strik?utm_term=what+can+i+make+with+grape+jelly PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4466657/normal_60430773a4bce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480582/normal_6059fdb918c28.pdfIn PDF document text
    • http://palaxofivuleduj.medianewsonline.com/bank_exam_english_solved_papers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372987/normal_601f2cde5bb9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471719/normal_6040719b0385b.pdfIn PDF document text
    • http://dasezin.getenjoyment.net/lirajudemolenefej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404133/normal_5fd26cd349bab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367927/normal_5ffa411f6df6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370996/normal_602e0e8e1264a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/duxijat.pdfIn PDF document text
    • https://fdb0147f-387d-4908-9c93-1ccdb5bf775f.filesusr.com/ugd/aea2e0_ecf1d659a01b4c47a798f8e06d559ca0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/94326781673.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/25405595115.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/why_is_sex_and_the_city_series_not_on_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/academia_de_vampiros_6.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/whatsapp_plus_2019_new.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/applications_of_no_limit_holdem_review.pdfIn PDF document text
    • https://1350f94c-8d6f-42b4-8351-24983ad6a49a.filesusr.com/ugd/4aae87_433f33ad7cb842a68eea495f831240e8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/1039677863.pdfIn PDF document text
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_f9c23eac1f8a4b3abb036c7af77aea40.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
    • 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DA 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off0000f7ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CE 5516 bytes
SHA-256: 244241c4d6c0d1d60abcab2adc153a30326d2c2d1f878149dea3890cce5638e2
font_02_sfnt_off00010a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A87 10224 bytes
SHA-256: 9ee994591898390b88146a89d12fe106b73e182ebaa652135e02ade9d1cb42a9
font_03_sfnt_off00012d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D7E 16384 bytes
SHA-256: f53b43e12006e3d52612f085e6e184fa5bba3604999f0cb64562e6bb996dc06b

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