Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b40e81ed17489fe…

MALICIOUS

PDF

69.5 KB Created: 2020-11-18 06:46:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2451573fdc3d329d1aed2eb0d4c26435 SHA-1: 253d3247a375c4aef2321b67375213807ce53100 SHA-256: 1b40e81ed17489fedf052a53dce6d5f4674479a34d1b3dad91a86a56131aeca0
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as an SEO link farm designed to redirect users. The primary redirector URL, 'https://traffset.ru/123?utm_term=blackberry+key2+verizon+whitelist', is used in conjunction with a lure related to 'Blackberry key2 verizon whitelist'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or scamming purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffset.ru/123?utm_term=blackberry+key2+verizon+whitelist PDF link annotation
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/degekofosekexatevux.pdfIn PDF document text
    • https://tobuzedatenet.weebly.com/uploads/1/3/4/3/134322281/4550610.pdfIn PDF document text
    • https://ninobajoxakatud.weebly.com/uploads/1/3/4/7/134702009/kavivaviw_dotalom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/genedesowul/zijarudovetofatanif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd070bc1-607e-4203-9a61-c8d78c5dde0d/tifazubewiwerufe.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/puffgames_sims_4.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/update_integer_value_sqlite_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/25161593634.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/60213920086.pdfIn PDF document text
    • https://s3.amazonaws.com/damevusom/promark_p70_vr_drone_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65b3f712-6b1f-40f3-a3f7-ceb59dcfe371/90635514035.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/thinking_out_loud_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/hernia_inguinal_causas.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/story_for_kids_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/2019_2020_tasfa_application.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 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A9 5364 bytes
SHA-256: 21d683ce276697e391ec2cdbe38ae767887066b9e00cc3b5d2a07b87ed34bfc5
font_01_sfnt_off0000d6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F9 10548 bytes
SHA-256: b851d37eaf981a58aec8b2eb69616aab2adca823c3e1a4a05df90eddb208bb5e
font_02_sfnt_off0000fb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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