Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0fe6dc9f8fd945b…

MALICIOUS

PDF

71.5 KB Created: 2021-05-12 12:17:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fc2312cb0fccf19f0df1392de09d1a5 SHA-1: d433b0213625e59dbad4fcc7e8b58aeea6dffee4 SHA-256: d0fe6dc9f8fd945b45d827a192cc4587fb491137649ecca4f733303f666e67d3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, forming a link farm, and is flagged by ML classifiers and ClamAV as malicious. The embedded content, though heavily obfuscated, references 'Dewalt hammer drill 20v lowes', suggesting a phishing or scam attempt to lure victims with a fake product advertisement. The primary malicious indicator is the extensive network of external URLs, likely used for redirection or hosting further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://resalured.ru/strik?utm_term=dewalt+hammer+drill+20v+lowes
    • http://rulajamizap.getenjoyment.net/38951052706.pdf
    • http://salizurewaki.mypressonline.com/9168865186.pdf
    • http://medilawibume.scienceontheweb.net/longman_dictionary_of_contemporary_english_free_download.pdf
    • https://nifakisafuzum.weebly.com/uploads/1/3/0/7/130775286/tesizomu.pdf
    • https://jinikegubu.weebly.com/uploads/1/3/4/8/134873825/0a876eca333.pdf
    • https://fafemuwupid.weebly.com/uploads/1/3/4/3/134368635/gobev-xelamowefij-nezogifododi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1bfce011-b1e6-402d-94ba-7ce236405f68/94646388787.pdf
    • http://rojanesifilagu.myartsonline.com/82635261812.pdf
    • https://uploads.strikinglycdn.com/files/24a7bd65-7bd8-4dff-af4a-463bfc0e1483/24156771275.pdf
    • https://s3.amazonaws.com/tizowodifi/74310109657.pdf
    • http://mipagolawalixa.onlinewebshop.net/good_night_moon_book_images.pdf
    • https://uploads.strikinglycdn.com/files/793f4914-b9d5-4927-8f5b-897b3ced69d9/mefovexul.pdf
    • https://uploads.strikinglycdn.com/files/7ca3d9b7-720f-4bfc-aa7b-94348c9535f4/3462496455.pdf
    • https://s3.amazonaws.com/wefemabeni/zotuwimimegezezituwoji.pdf
    • http://xufolat.atwebpages.com/apache_hadoop_3_quick_start_guide_download.pdf
    • https://uploads.strikinglycdn.com/files/a20776c2-7eaf-437d-9950-9137e7dcd913/what_are_the_importance_of_natural_satellites.pdf
    • https://uploads.strikinglycdn.com/files/7157e4a5-db76-4521-8e47-82f3480ffce8/9389281681.pdf
    • https://uploads.strikinglycdn.com/files/f5ecf4a8-1126-4da8-8026-58f22345ab80/song_of_swords.pdf
    • https://uploads.strikinglycdn.com/files/85528254-8a46-493f-b2a6-00ac8adff854/ring_spotlight_keeps_flashing.pdf
    • http://dupepoge.onlinewebshop.net/kambikuttan_malayalam_free_download.pdf
    • https://uploads.strikinglycdn.com/files/af186e7c-1ad5-468b-9734-7ce6e26f83ce/shepherd_the_flock_of_god_2019.pdf
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d868.bin
0c39a80c8c0a16f7e7a34828921853f6d1dd824cc0e517e2ebb17f802ec955a3
pdf-font-stream PDF embedded font (sfnt) at offset 0xD868 5488 bytes
font_01_sfnt_off0000eb00.bin
70a98cb5730fcb852bbdc816e7e62559044c19d8b4d51171c6e1a18837db7255
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB00 11080 bytes