Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d1315c8a6f0055…

MALICIOUS

PDF

79.2 KB Created: 2021-03-14 17:52:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 604a5ea47f49bef59b862dc396eac0f0 SHA-1: a29f43277482d854fcac46411853d01faf20d8fa SHA-256: 20d1315c8a6f00554d4a071caa486f8cf3537fa89e4f670b26c4217a1ce209a5
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 of which are SEO-optimized and point to potentially malicious or spammy content. The primary malicious URL identified is https://nipisod.ru/wix?keyword=eleanor+oliphant+is+completely+fine+pdf+espa%25C3%25B1ol, which is likely used to redirect users to further malicious sites. The ClamAV detection and ML classifier also indicate malicious intent, consistent with a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/wix?keyword=eleanor+oliphant+is+completely+fine+pdf+espa%25C3%25B1ol PDF link annotation
    • https://cdn.sqhk.co/kefekawit/iiChbrS/dreamer_movie_based_on_true_story.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374703/normal_6032d7e6c2406.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388169/normal_603c709ec45c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461484/normal_603889b92d74e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415934/normal_600b15ea3cc32.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/l2kifje/off_road_car_game_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/fowifabibu/fdFyhaz/free_music_streaming_radio.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/xedewofuretujo/19024413935.pdfIn PDF document text
    • https://972af30b-04c2-4618-b911-83ba0b7fef9e.filesusr.com/ugd/84a5c6_c07a685ee0324b51856e54aeeb7335d5.pdf?index=trueIn PDF document text
    • https://fb9345b8-40be-4608-a8ff-9c5427dba92f.filesusr.com/ugd/98d639_bfb4039a0bf94db8aefdbed994e2b1ab.pdf?index=trueIn PDF document text
    • https://1e1f235d-56dd-4976-b20d-d38e3fe7b172.filesusr.com/ugd/210b45_4ff7f9a980f546f3beb0bcb31084ed33.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/macrocephaly-_capillary_malformation_syndrome_incidence.pdfIn PDF document text
    • https://ec2d952e-5494-46d8-b841-fee222248b17.filesusr.com/ugd/9713d5_0357c1a055084d378d4df8a2a91af5e6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/29742021450.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/divozelalufirokekodugif.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/minecraft_bedrock_1.16_jungle_island_seed.pdfIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_64d6e76504944c819edc7abaed72b54d.pdf?index=trueIn PDF document text
    • https://8860adff-7f0b-4cf3-a358-cdd560dff136.filesusr.com/ugd/625844_631ff0b22c144b658c5fc12782208b37.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nabifovu/peraboramuguxufojavovax.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/61523623203.pdfIn PDF document text
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_3db050d396244d618cc2039d9cfda8fb.pdf?index=trueIn PDF document text
    • https://15e12281-0fef-4bb1-b284-2b61ddec1698.filesusr.com/ugd/6c5390_a5336b662ae94d97bda1b8f575b96df3.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_off0000f3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B4 5668 bytes
SHA-256: f9aa45c7a6b03a82d88054764cfd3b8d1ba69b496d64094aadf06a1768332450
font_01_sfnt_off00010699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10699 11684 bytes
SHA-256: 86bc73a45a58dcae12f6c66e8ebe820816cbac045aac92b04cf13a8c1ace0ffa

Open this report in the interactive analyzer, or submit your own file for analysis.