Malicious PDF — malware analysis report

Static analysis result for SHA-256 976f398286568d37…

MALICIOUS

PDF

54.0 KB Created: 2020-11-06 08:29:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7c4f5decb0588a0f83a63d4d528722bb SHA-1: 2d6fe781caa77e8ac5e05e5589aff8bb273a306c SHA-256: 976f398286568d372e564e09ed38ee86944bf71884d3245b8d8a2f13d9b6016d
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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
  • 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://traffine.ru/123?keyword=free+instagram+followers+app+apk PDF link annotation
    • https://jipidonano.weebly.com/uploads/1/3/4/3/134340070/5211088.pdfIn PDF document text
    • https://pelixenebedevo.weebly.com/uploads/1/3/4/3/134338689/6362782.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/3151875.pdfIn PDF document text
    • https://najuxobetejip.weebly.com/uploads/1/3/4/2/134265875/tuniwe.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/a5c25e4.pdfIn PDF document text
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/b0e6b854b556d6.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/banula/alif_novel_episode_7_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b309c0f-e9bc-41a1-9331-2b6e06fc34a2/piano_sheet_music_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/37541112058.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/petexuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/521a00a8-41a8-437e-8362-f006eaebcab5/lasekegizekik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64191dc5-9288-457e-9ff0-4f7a46ce95cd/71150392788.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/solvit_dog_ramp_canada.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000714a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x714A 5332 bytes
SHA-256: 0b0b5771179613b0c8f1169243925f52ba46dcc9e27e945d0b759c9757146c94
font_01_sfnt_off00008375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8375 10704 bytes
SHA-256: 8cd787bd6c7d58e18851df3b4e212630e15a4af1c443ffc5173737e23a376ecb
font_02_sfnt_off0000a7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7C5 21068 bytes
SHA-256: 2451549a902228024937cb3119c41ee7a389070ab873312c1b8207a42bc95ba7

Open this report in the interactive analyzer, or submit your own file for analysis.