Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee510614f9def41…

MALICIOUS

PDF

47.9 KB Created: 2020-03-30 02:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 753fbc9c9c2c9441dcbc57f7ccc9de08 SHA-1: 8bed916cdaae567fa7c1e233320003829cd1c2bc SHA-256: dee510614f9def412ec3da9907b56aeb59526cd6668d47a4ea5cf46bbc5e50b1
136 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The document body, though partially corrupted, suggests a lure related to 'inverse trigonometric formulas' to encourage clicks on these links. No scripts were extracted, and the primary malicious activity appears to be the distribution of numerous links hosted on various domains.

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://www.sincerelyslime.com/uploads/1/3/0/2/130289397/130289397.html#inverse+trigonometric+formulas+pdf+download PDF link annotation
    • http://trendytabs.com/uploads/1/3/0/7/130738964/sevuselutaxerit_penatinofapipi.pdfIn PDF document text
    • http://caymansand.com/uploads/1/3/0/5/130543025/visewogofelomo.pdfIn PDF document text
    • http://same.earth/uploads/1/3/0/3/130313495/6090581.pdfIn PDF document text
    • http://mypokegarden.com/uploads/1/3/0/2/130272636/tetokulimasew.pdfIn PDF document text
    • http://time2focus.net/uploads/1/3/0/2/130270775/sobafebufidixev_gixef_nunakevagewaw_popivafuvat.pdfIn PDF document text
    • http://love-eline.com/uploads/1/3/0/6/130639085/wujabad.pdfIn PDF document text
    • http://floritcommunicationsconsulting.com/uploads/1/3/0/5/130550847/06303807e2bd9.pdfIn PDF document text
    • http://swiffly.com/uploads/1/3/1/3/131383294/d634b9be7a.pdfIn PDF document text
    • http://mydreameyes.com/uploads/1/3/0/6/130605504/665387.pdfIn PDF document text
    • http://ssh2019.info/uploads/1/3/0/2/130272649/xekolorazipivun_wunilavepir_rokabo.pdfIn PDF document text
    • http://johnnybwildlife.com/uploads/1/3/0/7/130775820/1e8222.pdfIn PDF document text
    • http://thelogobro.com/uploads/1/3/0/8/130814248/2696971.pdfIn PDF document text
    • http://my-brad-lisa-memories.com/uploads/1/3/0/5/130551922/43986ad1ec2.pdfIn PDF document text
    • http://evangelismseminar.org/uploads/1/3/0/9/130969904/bezezulabepades.pdfIn PDF document text
    • http://stansmotorsales.com/uploads/1/3/0/7/130739433/d4469ea262d09f.pdfIn PDF document text
    • http://zenshidai.com/uploads/1/3/0/9/130969973/vanoxoradudobejoli.pdfIn PDF document text
    • http://jiur.org/uploads/1/3/0/2/130273735/lifedov_saxosugeva_midazisewenob.pdfIn PDF document text
    • http://olivetales.com/uploads/1/3/0/4/130488417/vakepidirofotipejeju.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: octarinesec.com 13 samples

Related samples 7

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7064 8560 bytes
SHA-256: 724833874cc951f90485426083ca01adada351e4ca7855f4fde8a6216bd36540
font_01_sfnt_off00009160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9160 2988 bytes
SHA-256: 6e2afe4324691a3c3a71b7653f03a4a599aa7dc33e86dd02acce13a6881b843a
font_02_sfnt_off00009bee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BEE 16144 bytes
SHA-256: 4bc316074ab7a945bfab345755761abf3c0c30bbefcbffa3ce2a779be7417175

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