Malicious PDF — malware analysis report

Static analysis result for SHA-256 b34da6da223dcc11…

MALICIOUS

PDF

90.2 KB Created: 2021-03-20 21:28:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f745ba60786a32e2b5e5cb652e98fad9 SHA-1: 5b880e180e54ec924f4cc29d31e3bdfc37d3b6da SHA-256: b34da6da223dcc116402364d6db0286122dd690b55b59d3a9b81e58123588517
156 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 0.9992

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://crophysi.ru/123?utm_term=bitdefender+antivirus+free+f%25C3%25BCr+android+test PDF link annotation
    • https://cdn.sqhk.co/jagibuvat/hiizage/42761814846.pdfIn PDF document text
    • http://winfreeiphone.xyz/key_concepts_of_general_systems_theory_includecntiq.pdfIn PDF document text
    • https://cdn.sqhk.co/tefegegesuxe/vwbphe8/myclasses_salisbury_university.pdfIn PDF document text
    • https://cdn.sqhk.co/lojenozasila/8fvhiDR/50205465618.pdfIn PDF document text
    • https://cdn.sqhk.co/dupeguwova/u8jbgjO/evoland_3d_vibration_plate.pdfIn PDF document text
    • http://lovemecompletely.com/sudeperarinusofizewapobijsn8s.pdfIn PDF document text
    • http://lnstagramsupportinfo.com/college_algebra_essentials_5th_editionv9gt2.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/zumomasugipeno/92641650340.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/boot_camp_services_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/zibususib.pdfIn PDF document text
    • https://f6ea5e03-7e7c-4dce-82ee-fd5d223759ef.filesusr.com/ugd/d203ad_d8bba218e448482f99af557a91545f32.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/garorowa/esoterickk_raid_report.pdfIn PDF document text
    • https://79ab8074-8148-4faa-9219-f6cdfa35bc15.filesusr.com/ugd/99e004_7395fc97622f409fbd761fe24f955a08.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5739026d-d60e-42ea-8437-d0ff0d152431/brown_and_tan_miniature_dachshund.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2a44404-3547-4ec9-869f-f0e62d042c47/bushnell_neo_xs_band_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/barnstable_county_court_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/buttermere_valley_guided_walks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90f3cf51-7668-43a8-824f-4a18a69b9773/1997_polaris_scrambler_400_4x4_manual.pdfIn PDF document text
    • https://e0fa0743-814d-41de-b6a5-47f787911882.filesusr.com/ugd/89d2ef_05b3786fb8c2425687084191bb31f8cd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/zupudar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7daaac3-0f1c-4a1e-8a56-cc892074541f/the_compound_effect_book_by_darren_hardy.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/kalajuxawo.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/facebook_ads_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/xigelafele.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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7A 5096 bytes
SHA-256: 70fce579579d37dce8b301035a418465d8e70947645a640709c72d9f03a9c04d
font_01_sfnt_off00012fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB4 12152 bytes
SHA-256: 2358059084032eda3bc5bf94ea3dfcf697c88e8634465b6eaeb4c5fbcb3bac63

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