Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b01def44aa3c971…

MALICIOUS

PDF

76.4 KB Created: 2021-01-03 07:50:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c2861de5bc9dccb71e8783314d27d3ea SHA-1: e1a62e9f67bc72910acf122ca95c45fb3208a5db SHA-256: 6b01def44aa3c971c6f16b3bb4c57cbb280b41bc605874014eebf14733ef46c5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The primary malicious URL, 'https://trafffe.ru/aws?utm_term=makalah+obat+anti+jamur+pdf', suggests a potential phishing or malicious redirection attempt. While no scripts were explicitly extracted, the presence of numerous external links and the ML classifier's high confidence score indicate a malicious intent, likely related to directing users to harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://trafffe.ru/aws?utm_term=makalah+obat+anti+jamur+pdf PDF link annotation
    • https://vupolape.weebly.com/uploads/1/3/4/7/134749420/nudexiwanadagirobize.pdfIn PDF document text
    • https://vomujozirokino.weebly.com/uploads/1/3/4/3/134318601/mapuje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387035/normal_5fc95e6b3f2eb.pdfIn PDF document text
    • https://sorafenime.weebly.com/uploads/1/3/4/3/134320910/efb732c96d3f7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4dcbc0e-677e-45d1-bc1e-00308f0e30ab/how_to_make_stress_your_friend_kelly_mcgonigal_ted_talk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d21611e5-f6f3-4266-89e6-84e77d15e0bd/sasemefebotarozekewimut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f7949e9-374b-4c5b-af0c-f2d0db2a0e68/rally_racer_dirt_mod_apk_1.6.0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/309c796b-1e8b-4c5a-a09f-7a62022e522b/suzet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d93d8e0d-f576-4565-aa7a-7c170ba12555/kill_box_rimworld.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/24908368921.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/aggiornamento_android_asus_zenpad_10.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24D 5388 bytes
SHA-256: 6e4c5ef8e0c6b71d0edea4352b1d57d00162daed175ac417028061828d6f42c9
font_01_sfnt_off0000f47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47E 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off0000ffe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE1 10664 bytes
SHA-256: be4cf29d80c6b0be2d8b70caaec2a0545aeb06a20031424141f204f6b4732111

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