Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcdaa8d4212a8eab…

MALICIOUS

PDF

82.2 KB Created: 2020-11-09 19:51:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 59cbfb55c714f4bc0bcb191966a45999 SHA-1: 7f2a177cf59c64095549db96831e491defd01aa0 SHA-256: fcdaa8d4212a8eabe748d84952538058857045916483facace25fe5b59099694
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 Weebly-hosted PDFs, indicating a link farm for SEO manipulation. ClamAV and ML classifiers identified this as a phishing or malicious PDF. The embedded URL 'https://trafftec.ru/aws?keyword=neuronal+activity+calcium' suggests a potential lure related to search engine optimization or traffic generation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafftec.ru/aws?keyword=neuronal+activity+calcium PDF link annotation
    • https://wejakoguxi.weebly.com/uploads/1/3/4/3/134324676/bibipiba_miminifurabawe_wumepojunirer_sofiveriv.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/balevedamurerozis.pdfIn PDF document text
    • https://kaxokotul.weebly.com/uploads/1/3/4/3/134380066/ponojigifogene-kukoziju.pdfIn PDF document text
    • https://jirixakevafu.weebly.com/uploads/1/3/4/4/134404576/ruboxisuwuzuzaw.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/9708270.pdfIn PDF document text
    • https://nowusunomotir.weebly.com/uploads/1/3/4/3/134314498/4147942.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/88dcdbb60.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/belapigojat.pdfIn PDF document text
    • https://fupopafesuz.weebly.com/uploads/1/3/4/4/134443157/pixejapofuxekazop.pdfIn PDF document text
    • https://dexoxewivovevub.weebly.com/uploads/1/3/4/3/134322619/2cd2720a4.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/nupotukig/geroxuf.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/33334055700.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/entertainment_in_the_1950s_and_1960s.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/define_nuclear_fission_reaction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e975d7bc-768a-45af-8bed-05910ad65706/1619761896.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/our_gangs_phone_number.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10552 4896 bytes
SHA-256: ca6f076873d8596848c4895618fd223fd1ede02e8e405a05c7636c5401b06b27
font_01_sfnt_off000115f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F5 11272 bytes
SHA-256: e7bbe625a1ab2da2f8af4d6af7452046e22aa077668988207e0a891fabd62736

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