Malicious PDF — malware analysis report

Static analysis result for SHA-256 e15812b499759ba1…

MALICIOUS

PDF

35.4 KB Created: 2020-06-03 23:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 5d74428f36415b266cfa7b0efabf0057 SHA-1: f62c4ac9dc883b9a58e87f3ffa2ee21aeb1396cb SHA-256: e15812b499759ba137603ffb2a3781ad7ce0fbb800e4c82b548b8727826e79c9
96 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, many of which appear to be part of a link farm designed to manipulate search engine results or redirect users to malicious content. The document body itself is heavily obfuscated and contains embedded URLs, further supporting the attack pattern of directing users to external, potentially harmful, resources.

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://yakutatautoleasing.com/uploads/1/3/0/7/130776101/130776101.html#eve+iteron+mark+v+fit PDF link annotation
    • http://armwrestlinghistory.com/uploads/1/3/1/0/131070806/5022926.pdfIn PDF document text
    • http://mytutoringgroup.com/uploads/1/3/1/4/131407310/88be9.pdfIn PDF document text
    • http://sta-66-99-58-204.ladse.org/uploads/1/3/0/4/130476462/dokurogirasab.pdfIn PDF document text
    • http://gavigrossman.com/uploads/1/3/0/5/130550785/15d7d0d7.pdfIn PDF document text
    • http://sanctuaryhealing.net/uploads/1/3/1/3/131384656/jurarekakok_xojejepukov.pdfIn PDF document text
    • http://healthierbydesign.org/uploads/1/3/0/4/130435649/xemupedunuri.pdfIn PDF document text
    • http://huaxinxianjinqipai.jhamrick.com/uploads/1/3/1/3/131380868/dunimimut-lipefu-nusope.pdfIn PDF document text
    • http://immobilienmakler-bogenhausen.de/uploads/1/3/1/8/131856492/jumororo.pdfIn PDF document text
    • http://yakutatautoleasing.com/uploads/1/3/0/7/130776101/terms.htmlIn PDF document text
    • http://yakutatautoleasing.com/uploads/1/3/0/7/130776101/dmca.htmlIn PDF document text
    • http://yakutatautoleasing.com/uploads/1/3/0/7/130776101/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://jupeveni.files.wordpress.com/2020/06/mizibunoveliveg.pdfIn PDF document text
    • https://sanolosu.files.wordpress.com/2020/06/nirazefisix.pdfIn PDF document text
    • https://rijapev.files.wordpress.com/2020/06/97963841354.pdfIn PDF document text
    • https://fiwukezebara.files.wordpress.com/2020/06/40111896690.pdfIn PDF document text
    • https://kudikinojov.files.wordpress.com/2020/06/xudabovapomo.pdfIn PDF document text
    • https://linutinoruso.files.wordpress.com/2020/06/kekuvepawasusesukigup.pdfIn PDF document text
    • https://mapelogi.files.wordpress.com/2020/06/xipujogotogepowu.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 3

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_off00005f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F50 10244 bytes
SHA-256: 665eb30de1e19e390280c6ffbb7fb83c1fa464099760bb6069c29dc9a4446846

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