Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f78d2c5979339c…

MALICIOUS

PDF

87.4 KB Created: 2020-06-06 09:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 0844dc8a781fbcd1bbd480c02d8db6e5 SHA-1: 0a20fecdd39ab45d9bba58f849094fc13941c978 SHA-256: 30f78d2c5979339ccf51c6450ffc6680de64eaece932e36446d8c59154b8699a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF file was flagged as malicious by an ML classifier and exhibits characteristics of a link farm. It contains numerous external URLs, with the primary heuristic identifying a mass external PDF link farm. The document body is heavily obfuscated and appears to contain embedded URLs, suggesting a lure to external malicious sites. No scripts were extracted from this sample.

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://lunartouchreiki.com/uploads/1/3/1/0/131070213/131070213.html#%25D9%2585%25D8%25AC%25D9%2584%25D8%25A7%25D8%25AA+%25D8%25AC%25D9%2586%25D8%25B3%25D9%258A%25D8%25A9+%25D9%2585%25D8%25AC%25D8%25A7%25D9%2586%25D9%258A%25D9%2587 PDF link annotation
    • http://mta-sts.redroselandscaping.com/uploads/1/3/0/5/130545745/jumegefizig-xupon-pagiloja.pdfIn PDF document text
    • http://haargalerie.eu/uploads/1/3/0/6/130639690/tedeluwolenoso.pdfIn PDF document text
    • http://mail.muabantoc.vn/uploads/1/3/0/9/130969191/2337685.pdfIn PDF document text
    • http://yoga4kids.nl/uploads/1/3/0/2/130273845/83aa9d.pdfIn PDF document text
    • http://mmb.nyc/uploads/1/3/0/2/130272976/gelobofexu.pdfIn PDF document text
    • http://webdisk.cawsab.org/uploads/1/3/0/6/130603954/be11fb1d8428.pdfIn PDF document text
    • http://huntingtonbeachrealestatephotography.com/uploads/1/3/0/8/130874123/lalafoletamopilo.pdfIn PDF document text
    • http://antivirus.parkroadbaptistcdc.org/uploads/1/3/0/7/130775619/b243a6406.pdfIn PDF document text
    • http://lunartouchreiki.com/uploads/1/3/1/0/131070213/terms.htmlIn PDF document text
    • http://lunartouchreiki.com/uploads/1/3/1/0/131070213/dmca.htmlIn PDF document text
    • http://lunartouchreiki.com/uploads/1/3/1/0/131070213/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wumexupe.files.wordpress.com/2020/06/34938563403.pdfIn PDF document text
    • https://seximapakoro.files.wordpress.com/2020/06/88271863113.pdfIn PDF document text
    • https://luvipif.files.wordpress.com/2020/06/23873971939.pdfIn PDF document text
    • https://jofoxuvi68340568.files.wordpress.com/2020/06/sevasivebikapikubirona.pdfIn PDF document text
    • https://tarunigufoza.files.wordpress.com/2020/06/devozosapabesomevofiz.pdfIn PDF document text
    • https://kopokugol.files.wordpress.com/2020/06/52566866789.pdfIn PDF document text
    • https://vurijaniw46832415.files.wordpress.com/2020/06/fofetozisu.pdfIn PDF document text
    • https://pukidolaza.files.wordpress.com/2020/06/50952987604.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
🗂 Part of campaign: parkroadbaptistcdc.org 3 samples

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000116c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x116C4 32964 bytes
SHA-256: ed7a8d4c51e3dd3788e7f823b83e7ceeae60520d7619ec4d91215c3518d948a9
font_00_sfnt_off0000f5e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E1 9496 bytes
SHA-256: 54f0baa0a97901fbec3af7bdd7c0947dfc9fe9d4385e59c7aab02b392898164e

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