Malicious PDF — malware analysis report

Static analysis result for SHA-256 570553456c4c87ed…

MALICIOUS

PDF

48.2 KB Created: 2020-03-08 00:55:40 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 629be8715ecf7da25483be3183734326 SHA-1: 5f29925b7b9c53396dab75d89e515af35f734c15 SHA-256: 570553456c4c87ed450ef2999b3b860784e263ea93283c87bfb53262fdfc7226
136 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO poisoning or to distribute further malicious content. The heuristic PDF_SEO_LINK_FARM specifically indicates this behavior, pointing to numerous PDF files hosted across various domains. No scripts were extracted, and the document body is heavily obfuscated, but the sheer volume of external links suggests a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://p3models.davidmichaeldesigns.com/uploads/1/3/0/5/130550715/130550715.html#sybr+safe+dna+gel+stain+in+1x+tae PDF link annotation
    • http://adenta.bg/uploads/1/3/0/5/130542937/2800259.pdfIn PDF document text
    • http://codesphere.org/uploads/1/3/0/6/130603728/wopisexino-jodipoxo-muxokotemip-gubofonojoje.pdfIn PDF document text
    • http://utahbirthpros.com/uploads/1/3/0/7/130776629/ae2c607ae1bd351.pdfIn PDF document text
    • http://digitalmei.com/uploads/1/3/0/7/130739056/a323c219ae37a70.pdfIn PDF document text
    • http://www.therightspotconsignmentshop.com/uploads/1/3/0/3/130323585/vubepogamekabu-jojazobovomiluk-wodetele-gusezovesexeki.pdfIn PDF document text
    • http://kpsmusik.com/uploads/1/3/0/6/130621048/nuwimojuwon.pdfIn PDF document text
    • http://algomaci.org/uploads/1/3/0/7/130775046/c20776c778a4.pdfIn PDF document text
    • http://ryanbelong.com/uploads/1/3/0/6/130604700/6299531.pdfIn PDF document text
    • http://www.luxurybridalfurshop.com/uploads/1/3/0/6/130639658/daxewubime.pdfIn PDF document text
    • http://languageofrecovery.us/uploads/1/3/0/4/130476432/8258046.pdfIn PDF document text
    • http://mta-sts.restripeplus.com/uploads/1/3/0/2/130289756/8605283.pdfIn PDF document text
    • http://www.thesoaperyshoppellc.com/uploads/1/3/0/9/130969340/18127f294b.pdfIn PDF document text
    • http://nikkimichelleandthecosmiccollectivemusic.com/uploads/1/3/0/4/130483739/befofub-gofenabofevel-zoxidowasinugu.pdfIn PDF document text
    • http://cyclebavaria.com/uploads/1/3/0/4/130489131/601e401cf9610.pdfIn PDF document text
    • http://missfitonline.com/uploads/1/3/0/7/130739633/7398800.pdfIn PDF document text
    • http://whateverwelding.com/uploads/1/3/0/8/130874652/wonifelemofuroleseb.pdfIn PDF document text
    • http://5puntocero.net/uploads/1/3/0/2/130271114/dexog.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

Related samples 4

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
font_00_sfnt_off00007be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE6 9120 bytes
SHA-256: 93bb39b6748401a0d1fd17ee427ba2ad16be75465050d55fb0f481a9c3906a55
font_01_sfnt_off00009e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E61 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

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