Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddce44529c57eb89…

MALICIOUS

PDF

92.2 KB Created: 2021-02-15 13:05:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 363462b3e955627074d3eb7ffbfb6382 SHA-1: cdb0609c5e5e6eb3d6babe973a303b2e9a386291 SHA-256: ddce44529c57eb89e1a2ebcc5f08b591964364b142514a70c23b2155c9ff1645
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of external links, many pointing to SEO redirectors hosted on Weebly, designed to obscure the ultimate destination. The primary malicious URL identified is jottigo.ru, which is likely used to host phishing content or distribute further malware. No scripts were extracted, but the PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://jottigo.ru/123?utm_term=multivariate+outlier+analysis+python PDF link annotation
    • https://sodefabufu.weebly.com/uploads/1/3/4/4/134473286/kawunasatejabeta.pdfIn PDF document text
    • https://sedivunoruset.weebly.com/uploads/1/3/4/8/134859312/zojeri.pdfIn PDF document text
    • https://pufopobumosuv.weebly.com/uploads/1/3/0/7/130776602/ragobamewirod.pdfIn PDF document text
    • https://denuxikunoleluj.weebly.com/uploads/1/3/4/0/134018299/3a4253761.pdfIn PDF document text
    • https://nawawedivoxoni.weebly.com/uploads/1/3/4/7/134719505/nitudetomorodalen.pdfIn PDF document text
    • https://cdn.sqhk.co/ripigopes/ihJgigc/revefor.pdfIn PDF document text
    • https://xidoteruredogon.weebly.com/uploads/1/3/1/4/131454367/wonexezobadejul-bufixinitipo-rudusuvawif-bavurigafefebuz.pdfIn PDF document text
    • https://toxafowusolele.weebly.com/uploads/1/3/2/8/132815148/dofonu.pdfIn PDF document text
    • https://nejuxudukekiti.weebly.com/uploads/1/3/0/8/130874136/2272578.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/fusopoxipo/23634774904.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/dofinet.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/blaupunkt_new_jersey_nj8820_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/honing_guide_for_chisels.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/mikejizi.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/67396283316.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/sinusoidal_waveform_for_voltage_and_current.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/86783804161.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/40518356747.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_off00011ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDF 4956 bytes
SHA-256: 7737179875e9893cad586a41fa6652670ca343cdd6a1fe73571270e7b4685e90
font_01_sfnt_off00012ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBB 11652 bytes
SHA-256: b40aac2ca213f6d20656028c13ef777ca881d48f037ca2c7d3cdaea77e1024c0
font_02_sfnt_off0001559b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1559B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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