Malicious PDF — malware analysis report

Static analysis result for SHA-256 221ca1a285c44a43…

MALICIOUS

PDF

78.7 KB Created: 2021-03-30 14:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b71f1c6f1fc934195fb0a16a5b492125 SHA-1: b60a2ed6292cfb077b223f3b5fe0a2b626475406 SHA-256: 221ca1a285c44a43a9e3371911ee8b7c07ec8adb301f9bc86dab2893cc05ea6a
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_SEO_LINK_FARM, indicating a large number of external links, and an embedded URL pointing to a suspicious domain. The document body, though partially corrupted, contains text related to "Chrome terbaru offline 64 bit", suggesting a lure. The presence of multiple external links, including one to resalured.ru, strongly suggests a phishing or scam attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=chrome+terbaru+offline+64+bit
    • http://tryplafond.xyz/enron_the_smartest_guys_in_the_room_streaming_freetpaiw.pdf
    • http://giwosesupalu.medianewsonline.com/b_l_theraja_basic_electronics_download.pdf
    • http://kitazixozakabu.sportsontheweb.net/braun_thermoscan_3_how_to_use.pdf
    • http://vadosaj.getenjoyment.net/burger_king_meatless_impossible_whopper_calories.pdf
    • http://navaram.online/87993233971mi6qs.pdf
    • http://domsale.xyz/nurobodakomiwavefominuluvi3kd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e5eb5b25-b33c-43e3-82d5-57ab1bf863d8.filesusr.com/ugd/b0c717_017cf5bc0cfe4b158a24efa4c490f209.pdf?index=true
    • https://uploads.strikinglycdn.com/files/23b8aec6-7eb6-4c3e-a5f6-27de6beb84f9/82333490957.pdf
    • https://uploads.strikinglycdn.com/files/fd50e2ae-e118-434f-9df0-f21d20d827b3/can_you_play_the_game_of_life_online_with_friends.pdf
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_5606d557426643ffb5df35af21613993.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4f7a8cb9-7a43-40be-94ac-6aaa46ef7abd/vofixusotenuzigotemufapu.pdf
    • https://uploads.strikinglycdn.com/files/5bb2a6f6-ccbe-49e6-a71c-b5e034a6752d/what_is_the_lathe_of_heaven_about.pdf
    • https://uploads.strikinglycdn.com/files/cddcffa9-2ed1-4155-bf31-9036c41a0b4e/milufovobovafonozamig.pdf
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_d208d25f072f4259850c56cb80f93203.pdf?index=true
    • http://jigisasamupor.onlinewebshop.net/93870670622.pdf
    • https://uploads.strikinglycdn.com/files/3f29de62-cdc3-4c80-91ca-e37aa64b613d/difference_between_cycleops_fluid_and_fluid_2.pdf
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_5c398d6cd0424521b032e7f339059e2f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0a3292b8-45fc-4838-a440-1f6f54440c91/37078199688.pdf
    • https://uploads.strikinglycdn.com/files/25ea7185-e8bf-483e-a182-e8d692bfd6d6/c_pass_reference_pointer.pdf
    • https://uploads.strikinglycdn.com/files/a97c3ab3-121a-4122-8fe9-072cc30c069d/16951796972.pdf
    • https://uploads.strikinglycdn.com/files/dd7cd38c-9ad2-422d-b04c-2855a576ac45/what_are_current_issues_in_higher_education.pdf
    • https://2d2b1dae-c014-4902-97e6-c3f1d56915cd.filesusr.com/ugd/70e5f7_41d6e5bf1eff4f53951cb3d898392813.pdf?index=true
    • 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_off0000f589.bin
fb0d5943bf4a09b23dec5c3e8a405ef2cf571c20e943051fff63ed4fb458fa47		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF589 5116 bytes
font_01_sfnt_off000106c8.bin
5ae95b4db041283fc7dc555677010a5d5fc185da904a1f3afe71b2cae2349de5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106C8 10804 bytes

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