Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f1d138fd9b41f6f…

MALICIOUS

PDF

44.1 KB Created: 2020-08-21 22:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 757e3f7eaf39b6b9265b895955fb86d2 SHA-1: 610b3a3f92a444a43309ac9d324eacdcc97d944b SHA-256: 5f1d138fd9b41f6f92d8cb99b3446dcd0148a7790d0180383dc241218a0cb128
210 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a lure for a 'Bses online new connection application form' and includes a call-to-action button. It embeds multiple links, with a primary redirector URL pointing to a known malicious infrastructure. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests SEO abuse for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 https://ttraff.ru/pify?keyword=bses+online+new+connection+application+form In PDF document text
    • http://files.dspespta.com/uploads/1/3/0/8/130874115/jururer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/xarizonalitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0962/1665/files/zotulepotarepitafarolara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2522/6152/files/kofiridevaxomezumewopez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9190/9025/files/mugot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7555/9829/files/14598932474.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5097/5910/files/34762479972.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/zixanunux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/21173464713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/android_action_bar_back_button_animation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8830/6586/files/abide_with_me_score.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0255/2742/files/87241051947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/7006/3520/files/58073229992.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
🗂 Part of campaign: pkpressurekleeninc.com 6 samples

Related samples 8

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_off00006dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD0 5300 bytes
SHA-256: a7d48ee85e9f6dd0ca4f34ead3f19b5919b6dd4cfe23f14f4d86d36db0dd5f30
font_01_sfnt_off00007fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD5 10404 bytes
SHA-256: 0ad86a5f42dbb83108138e45200df2a55e696d674524ce0bdd40b658ab249693

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