Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd2b452f09ffec3…

MALICIOUS

PDF

76.2 KB Created: 2021-03-16 20:41:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 29649be3b8ede10e0d79755e2c0b8f02 SHA-1: ebc5c39a4782e0ac915f68709d136ce822f23459 SHA-256: ddd2b452f09ffec359824e98c8cffcb1386b0a776f1017f52aa04c9b2ab14985
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The document body, though partially corrupted, contains keywords related to 'Ielts speaking cue cards' and 'pdf', likely serving as a lure to entice users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/award?keyword=ielts+speaking+cue+cards+september+to+december+2020+pdf PDF link annotation
    • http://sizuxofutitarax.mypressonline.com/historia_universal_jackson_spielvogel_gratis.pdfIn PDF document text
    • http://baugroup.info/cache_cleaner_super_2018_apkaywpn.pdfIn PDF document text
    • https://vepawedisekonok.weebly.com/uploads/1/3/4/9/134900222/a84e4517889.pdfIn PDF document text
    • http://xevamoz.mygamesonline.org/36_sub_zero_refrigerator_specifications.pdfIn PDF document text
    • http://lovemecompletely.com/original_little_mermaid_story_by_hans40lds.pdfIn PDF document text
    • http://0fruits.space/anu_degree_hall_ticket_2019mamg3.pdfIn PDF document text
    • https://selokifasafu.weebly.com/uploads/1/3/4/3/134383977/puganamufulix_zuzobuvu.pdfIn PDF document text
    • https://xoxudepibedewem.weebly.com/uploads/1/3/5/3/135317482/lajesavabovaforedi.pdfIn PDF document text
    • https://zikenanevo.weebly.com/uploads/1/3/4/5/134589255/zowuvasoxusipu-vezulopaxeka.pdfIn PDF document text
    • http://idealica-ufficialeitalia.website/foratofimavovekuzuviwe8986p.pdfIn PDF document text
    • http://mp4.design/buy_the_golfing_machine_booklkoce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_adcc4114886c41f0a27c736a215df7ec.pdf?index=trueIn PDF document text
    • https://8641c524-1fb5-4292-87ed-dd72f64d6c22.filesusr.com/ugd/9b7d8a_3af287fd5f2f4362978a5eb558b32b78.pdf?index=trueIn PDF document text
    • https://a804c8a8-fdf7-4fba-b19b-c23aecc29597.filesusr.com/ugd/a7074a_e76c46ebbfed46708bf2da1708317290.pdf?index=trueIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_e41c8673a5704f649540c22048e77d61.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bf9f6e8-a3d0-4581-b25b-25fac1cd5dc3/jorof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2834112-a0de-4dac-9acc-17bb3be0579f/how_to_change_trigger_on_beretta_92fs.pdfIn PDF document text
    • https://58960a86-a3f4-42d8-866e-ee2cf32068b1.filesusr.com/ugd/1ad962_1152c2ee82664271a45186358bba3a7a.pdf?index=trueIn PDF document text
    • https://0ccb9a81-bd3c-41bd-bc79-2352350f0e5e.filesusr.com/ugd/95ea6b_59cb0062acaf48c2ad263652ceb4e281.pdf?index=trueIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_18c66b4813014c87930de5730f120f2b.pdf?index=trueIn PDF document text
    • https://ee897e78-a157-4eb5-8a47-d615096087a2.filesusr.com/ugd/113e89_cd6694982d634fbabd4409e6ecab956a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/048d7ca3-c683-4598-8e74-f2ca81ea512b/34729990939.pdfIn PDF document text
    • https://4eb3a9b5-ca6a-4b2a-896e-878abc754f3b.filesusr.com/ugd/f1ab86_034dcede4f43440cbbc0a90d49182470.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB76 5892 bytes
SHA-256: 282daaafe16afe53a8535dcf167e986765ae5b5bdb345c61a701034dd06d9edd
font_01_sfnt_off0000ff6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6C 10376 bytes
SHA-256: edf7a62ccd636c2b7c6a6e7475249f41271f7888f8f6e889346d1a17751a5944

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