Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f01ed0a2aa5fa20…

MALICIOUS

PDF

86.2 KB Created: 2021-03-28 00:17:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5dc85412a2f89b534eed60d35fa2cf23 SHA-1: b22524591e04e4d76370ab7a4787b76560b6fb13 SHA-256: 2f01ed0a2aa5fa20b7e71f82ef0252c8a274167294faaf761806accd8766261b
254 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating it's a phishing or trojan delivery attempt. It contains numerous links to external websites, including a known malicious redirector at 'https://yafferge.ru/award?keyword=behavioral+biases+in+investment+decision+making+pdf', and a link farm designed to appear as free PDF downloads. The document body, though heavily obfuscated, suggests a lure related to 'behavioral biases in investment decision making'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://yafferge.ru/award?keyword=behavioral+biases+in+investment+decision+making+pdf In PDF document text
    • https://kezeminitiwo.weebly.com/uploads/1/3/4/4/134476020/tuzosobaforiwog.pdfIn PDF document text
    • https://sivavodafewe.weebly.com/uploads/1/3/4/4/134484486/a5b265941ee.pdfIn PDF document text
    • https://puxedeva.weebly.com/uploads/1/3/4/7/134730870/9740195.pdfIn PDF document text
    • https://fogoranamixite.weebly.com/uploads/1/3/5/3/135390362/mobevivebarojejab.pdfIn PDF document text
    • https://pugixodazujok.weebly.com/uploads/1/3/2/7/132710779/nigegazexivakef-dufigixijoxu.pdfIn PDF document text
    • https://vaniselati.weebly.com/uploads/1/3/5/2/135293279/wedasa_kepifonu_sezuwexa.pdfIn PDF document text
    • https://livubefelamujir.weebly.com/uploads/1/3/4/8/134899239/178774ab9f0.pdfIn PDF document text
    • https://wanuwajazil.weebly.com/uploads/1/3/4/8/134899981/9564514.pdfIn PDF document text
    • https://guridawado.weebly.com/uploads/1/3/4/5/134578433/9234553.pdfIn PDF document text
    • https://webesamogamafi.weebly.com/uploads/1/3/4/0/134012635/sotoxedogasozasunir.pdfIn PDF document text
    • https://pojixaguwor.weebly.com/uploads/1/3/1/4/131453565/2898561.pdfIn PDF document text
    • https://mesasijodise.weebly.com/uploads/1/3/5/3/135315214/tozedavepituze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/papuja/swf_embroidery_machine_price_in_pakistan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c20d170-9c74-4cf5-933a-60228ea9a798/onn_radio_walkie_talkie_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2de3906a-b9ae-4905-9a88-199ebf78a006/tabejusutigusol.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/71644058793.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/checklist_template_excel_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cee26b5-c28e-4da5-a441-e09c4b3caad2/honda_pioneer_1000_utv_for_sale_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a21c31-c978-4d19-90ac-c0d4ce90a8ef/the_long_haul_movie_1957_rotten_tomatoes.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/73574454745.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/basikamamo.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/3976376654.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/79223600458.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/66482937355.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/mortal_kombat_10_android_free.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE6 5884 bytes
SHA-256: 9e5c3779c8661d6b70e35044bd9b57d94e177908d6ee8ac5be7a7c2274fb5d36
font_01_sfnt_off000123c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C5 11284 bytes
SHA-256: 2eece7f1fb1975975c1ccb8f82103bb833fbe6004c91fce52c0ec0f85ea40c30