Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f9f1e222d9928e…

MALICIOUS

PDF

40.8 KB Created: 2020-06-14 13:07:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-10
MD5: 971db5d698a2ef42a3cea93e613e6a68 SHA-1: be7455dc6140e9f0ad1e481d7731e4a042e0d607 SHA-256: 56f9f1e222d9928eedef3e60a1718d8303b4830fac71966cca6a4c6391d82850
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text related to 'Childrens' bible lessons' and metadata from wkhtmltopdf, suggesting a lure. The primary intent appears to be directing users to a network of linked PDF files hosted across various domains, potentially for SEO spam or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://weeklycoinupdate.com/uploads/1/3/0/7/130739240/130739240.html#childrens%2527+bible+lessons PDF link annotation
    • http://thesocialweekly.com/uploads/1/3/0/2/130272804/531373.pdfIn PDF document text
    • http://kenzandleslie.net/uploads/1/3/0/2/130289411/9249010.pdfIn PDF document text
    • http://nwawindowtinting.com/uploads/1/3/1/4/131437660/687c4.pdfIn PDF document text
    • http://onlensale.org/uploads/1/3/1/0/131070168/zorawusefixalixokef.pdfIn PDF document text
    • http://hostmaster.hungerandhunter.com/uploads/1/3/1/3/131398143/3f685360be26.pdfIn PDF document text
    • http://jwrs.co.uk/uploads/1/3/1/3/131380730/vedofi.pdfIn PDF document text
    • http://cpanel.lab-dentalevolution.com/uploads/1/3/0/6/130603725/xewufaxez-koxadije-gisabitituno-dosekaluga.pdfIn PDF document text
    • http://erinhoover.net/uploads/1/3/1/0/131070342/4702267.pdfIn PDF document text
    • http://glamgraceboutique.com/uploads/1/3/0/6/130639714/5079529.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://raxipezu438730587.files.wordpress.com/2020/06/suvimuxewisagukiguvupu.pdfIn PDF document text
    • https://tixivojake.files.wordpress.com/2020/06/xazokitekuwujadagobukaf.pdfIn PDF document text
    • https://lejobadoni.files.wordpress.com/2020/06/kuzixirogagokepefabuki.pdfIn PDF document text
    • https://vupejesos.files.wordpress.com/2020/06/wosegisibokagijuweduda.pdfIn PDF document text
    • https://wiginikinu.files.wordpress.com/2020/06/87926551841.pdfIn PDF document text
    • https://bujoguzone.files.wordpress.com/2020/06/duwuvitigogarawiwimud.pdfIn PDF document text
    • https://zupukibi.files.wordpress.com/2020/06/71285131156.pdfIn PDF document text
    • https://povaduw.files.wordpress.com/2020/06/movuvefewomiwomav.pdfIn PDF document text
    • https://zawamibidixa.files.wordpress.com/2020/06/bupunonegilipujabi.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 1

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74C7 10276 bytes
SHA-256: 3c36616c0b830a754723c86c7474ac36c1c2054e418457396ffdd9aaef38bed9

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