Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb80170effc2944d…

MALICIOUS

PDF

77.9 KB Created: 2021-03-10 12:36:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8a55657769fd0dac27002a8dc6614b02 SHA-1: 301ce3cb4b14e6e9548e0cb0b4abd427634cd73e SHA-256: bb80170effc2944da1b09d39cf8568a688ec035e703af45b3f02e6ec4ff5df05
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though truncated, mentions 'Divinity 2 enchanter guide', which is likely a lure to entice users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/123?utm_term=divinity+2+enchanter+guide PDF link annotation
    • http://pekibimige.mygamesonline.org/59157283541.pdfIn PDF document text
    • https://nupepapuk.weebly.com/uploads/1/3/1/4/131484133/3bc2228ab844a.pdfIn PDF document text
    • https://gijesilikisuzid.weebly.com/uploads/1/3/2/6/132683000/ludumud.pdfIn PDF document text
    • https://cdn.sqhk.co/sixerusesebu/yihgghJ/child_care_near_me_open_early.pdfIn PDF document text
    • http://wutopezogegusi.getenjoyment.net/16732008534.pdfIn PDF document text
    • https://cdn.sqhk.co/fexefurif/QSJiaih/12341299978.pdfIn PDF document text
    • https://cdn.sqhk.co/leloxoreje/iiDhigd/zajat.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/the_kissing_booth_road_trip_book_ending.pdfIn PDF document text
    • http://zakomuxoza.getenjoyment.net/asus_rt-ac87u_firmware_tomato.pdfIn PDF document text
    • https://cdn.sqhk.co/luwanuriwaba/lEgc2hg/77673813144.pdfIn PDF document text
    • http://kedusigodozop.22web.org/integrate_sin_inverse_x_square.pdfIn PDF document text
    • https://cdn.sqhk.co/sazalevimit/aiigj66/53024067596.pdfIn PDF document text
    • http://pexawegowe.mywebcommunity.org/how_to_write_a_paragraph_7th_grade.pdfIn PDF document text
    • http://dajinanumiki.iblogger.org/3513194708.pdfIn PDF document text
    • http://pozuvixa.getenjoyment.net/1338678029.pdfIn PDF document text
    • http://gagimubu.mywebcommunity.org/paburofogadu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xigesema.epizy.com/loruvaxidol.pdfIn PDF document text
    • http://turikumulalevi.rf.gd/idiot_test_answers_and_questions.pdfIn PDF document text
    • http://sibugisijan.epizy.com/59295300170.pdfIn PDF document text
    • http://rivenoke.onlinewebshop.net/72946433857.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d59063d-7b8f-4535-8b78-4a282822473a/marcel_proust__la_recherche_du_temps_perdu_extrait.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cba4481-d8bd-4a37-be30-5216e0c28d90/45182466321.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_off0000f453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF453 5284 bytes
SHA-256: 80b008eb2e1f34a67f9c4c52aa4a11b049760f2e3f685a08a7e23e72ddbe98c2
font_01_sfnt_off0001065e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065E 10596 bytes
SHA-256: 1870097ec03be91eadb0b619c9a71c69bc88099800b6c0e8beeaccff51974232

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