Malicious PDF — malware analysis report

Static analysis result for SHA-256 8114ff8a41ee8024…

MALICIOUS

PDF

39.2 KB Created: 2020-04-16 04:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 39b2caee54a70eb649bb6a8cc79d306a SHA-1: 4e3f88fc6d374450bcca7604c5a86181fd55f79f SHA-256: 8114ff8a41ee8024c7fdff6c1ac44fe537a9a5d6a93f761574f1599522c3a4f6
94 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The primary external URI found is http://hypnose-kinderwunsch.com/uploads/1/3/0/5/130588424/130588424.html#adapt+sound+s5+apk. This suggests a link farm or SEO poisoning attack, designed to drive traffic to potentially malicious or phishing sites. No scripts were extracted, and the document body was heavily obfuscated, but the presence of numerous external links is a strong indicator of malicious intent.

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://hypnose-kinderwunsch.com/uploads/1/3/0/5/130588424/130588424.html#adapt+sound+s5+apk
    • http://clearbluepoolsvc.net/uploads/1/3/1/6/131637811/f72bf250b0.pdf
    • http://vibrows.ca/uploads/1/3/0/9/130969209/pikogopivevi.pdf
    • http://relationaldharma.org/uploads/1/3/0/4/130476205/478821542.pdf
    • http://dronetrout.com/uploads/1/3/0/6/130639554/zoxaligepebopusum.pdf
    • http://deliciouspoison.com/uploads/1/3/0/4/130477170/8785024.pdf
    • http://lenorenorrgard.net/uploads/1/3/1/6/131606407/9511636.pdf
    • http://mycardiodrive.com/uploads/1/3/1/4/131454556/kuriwaf_fibiso.pdf
    • http://myrecollectables.com/uploads/1/3/0/9/130969216/d127f02c7a.pdf
    • http://conoreager.com/uploads/1/3/0/4/130483739/6803953.pdf
    • http://abachanges.com/uploads/1/3/0/6/130639740/2612169.pdf
    • http://housematesnorthampton.com/uploads/1/3/1/4/131454394/zejusakolarino_duniwegufi_najog_vazefibemaji.pdf
    • http://commongracetherapy.com/uploads/1/3/0/3/130323600/wifeviduvaso.pdf
    • http://housematesnorthampton.com/uploads/1/3/1/4/131454394/zejusakolarino_dun
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000680f.bin
2eda1f64b696671580ab21f9ba3c8630127ba649caa68212b74f584acfab25c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x680F 8152 bytes
font_01_sfnt_off0000878c.bin
7466f12abaaa7f3061b2eee0fbea2aff938e674d3fe107531bc2e00f9f0dfbcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x878C 2600 bytes

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