Malicious PDF — malware analysis report

Static analysis result for SHA-256 a338a5e2336fc139…

MALICIOUS

PDF

67.6 KB Created: 2020-04-16 22:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 835ff2b4cc5d0e90470da37b3cde978b SHA-1: 08f99425b2d606ee21cc0d6036aa7bed65db4a68 SHA-256: a338a5e2336fc1395e4b2138dedc6878c6470f6e17c596ef41d3157e68034196
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to other PDF files hosted on similar domains. This pattern is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest this malicious intent. No scripts were extracted, limiting the analysis of direct payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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 http://ccjustice.net/uploads/1/3/0/6/130605472/130605472.html#elsword+ara+apsara+guide PDF link annotation
    • http://callumstacy.com/uploads/1/3/0/6/130620557/wepewutulexa_bakevajuzide.pdfIn PDF document text
    • http://falmouth-acupuncture.com/uploads/1/3/0/4/130483416/9533961.pdfIn PDF document text
    • http://troylittleitaly.org/uploads/1/3/0/6/130639220/6057148.pdfIn PDF document text
    • http://oklahomacity-appraisals.com/uploads/1/3/1/4/131438068/9773844.pdfIn PDF document text
    • http://minerup.com/uploads/1/3/1/4/131407514/4987584.pdfIn PDF document text
    • http://goldmindmvmt.com/uploads/1/3/0/8/130874408/gimumomove.pdfIn PDF document text
    • http://stemkids.net/uploads/1/3/0/6/130639462/sovet-pinudi-lepinagamerup-jopaj.pdfIn PDF document text
    • http://londonbroadcastingcompany.com/uploads/1/3/0/7/130775856/kodazurabababu_mujon_nuduzepotixuzid_xivobudema.pdfIn PDF document text
    • http://dzaka1908.com/uploads/1/3/0/2/130287845/guvozotuparut.pdfIn PDF document text
    • http://ajhollowayministries.com/uploads/1/3/0/4/130435751/5301098.pdfIn PDF document text
    • http://unclebearpublishing.com/uploads/1/3/0/2/130289415/gimugakiwox.pdfIn PDF document text
    • http://ourbeautifulfeet.org/uploads/1/3/1/4/131413905/cd28037910.pdfIn PDF document text
    • http://yourbestcreditnow.com/uploads/1/3/1/4/131406962/904484.pdfIn PDF document text
    • http://iwspumps.com/uploads/1/3/0/7/130738681/7332627.pdfIn PDF document text
    • http://ridingrubber.com/uploads/1/3/0/7/130739087/927073.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
    • http://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: flyingowlexhibitions.com 8 samples

Related samples 5

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009cac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CAC 9256 bytes
SHA-256: f304c7bdcfc20016752d88c1e9eaefa227f3bc5ec190f8f679cf9f934ae02e91
font_01_sfnt_off0000beb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEB3 2600 bytes
SHA-256: 7466f12abaaa7f3061b2eee0fbea2aff938e674d3fe107531bc2e00f9f0dfbcf
font_02_sfnt_off0000c7b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B4 10856 bytes
SHA-256: 055dd2ab85cbd60ff845fbaa9fc39ee867ec2a54c2f96d6f7950ea0e699c4bcc
font_03_sfnt_off0000eb40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB40 16212 bytes
SHA-256: e1861256e1b159dd04574775020376bbde735aabde42b87dff04d6f7f950bfdf

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