Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d2978702d84644…

MALICIOUS

PDF

94.7 KB Created: 2021-03-14 16:43:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a6d6be1acc025ec6311e773cf7771a1 SHA-1: d83d041ee0d74f3a5c1a74ccfe60c5b223f9c13a SHA-256: f7d2978702d8464464870c5f7765e17e8fbcf28ebf6be61f306477af36b1988e
156 Risk Score

Malware Insights

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

The PDF document was flagged by ClamAV as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' and an ML classifier gave a high confidence score. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, suggesting a malicious intent to redirect users or manipulate search engine results. While no scripts were explicitly extracted, the nature of the PDF and the link farm heuristic suggest it may be used as a lure for phishing or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/123?utm_term=arabic+alphabet+with+sounds+pdf
    • http://finonit.mypressonline.com/xolofakigejilarexiwunuk.pdf
    • http://jaxifas.getenjoyment.net/english_auxiliary_verbs_table.pdf
    • http://wozufilugud.iblogger.org/talapanawa.pdf
    • https://jedewudozoj.weebly.com/uploads/1/3/0/7/130739070/8097b727d.pdf
    • https://cdn.sqhk.co/gifalaminika/hcZJiim/how_much_area_for_free_range_chickens.pdf
    • https://cdn.sqhk.co/lagusive/cigpgjf/fuxujogojipexerinototaj.pdf
    • https://simisodiguguvig.weebly.com/uploads/1/3/5/3/135324772/xejezopag-tumavusuw-godivimuranak.pdf
    • http://labifovejes.mypressonline.com/is_sears_repair_still_open.pdf
    • https://ronurakegilapoz.weebly.com/uploads/1/3/4/8/134852428/9349108.pdf
    • https://gewifikapogesel.weebly.com/uploads/1/3/5/3/135351592/bajajofilovevavun.pdf
    • https://cdn.sqhk.co/turanexode/gd9idhr/lyrical_video_status_maker_app_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mosezavor/kali_linux_raspberry_pi_4_headless.pdf
    • https://s3.amazonaws.com/wopari/pakilojiguwinelo.pdf
    • https://s3.amazonaws.com/xumakomowi/somavinax.pdf
    • http://fowimifefezujo.myartsonline.com/biwagafaxagibijewativej.pdf
    • https://s3.amazonaws.com/polexebuj/wow_legion_brewmaster_monk_guide.pdf
    • https://s3.amazonaws.com/zafijukopa/shri_ganapati_atharvashirsha_in_marathi.pdf
    • https://s3.amazonaws.com/mefadedosuw/which_companies_are_listed_on_the_london_stock_exchange.pdf
    • http://rolewafofe.epizy.com/barbie_girl_movie_in_tamil.pdf
    • http://ziwemasux.myartsonline.com/vexixebifasofagurojega.pdf
    • http://fisazivibutaz.epizy.com/angry_birds_hack_android_1.pdf
    • https://s3.amazonaws.com/babuxufarizuxur/19248541973.pdf
    • http://varaxekewuveza.epizy.com/kebiti.pdf
    • http://sevezogare.rf.gd/99069333476.pdf
    • https://s3.amazonaws.com/vetamedisoz/bigezutikedadan.pdf
    • https://s3.amazonaws.com/wutisigila/is_yoga_good_for_back_and_neck_pain.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00013ea9.bin
63e2c51a0da374980de344d5c96bf249e55b8d7562a404ff2375ec16006e5ada		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13EA9 27468 bytes
font_00_sfnt_off000102d5.bin
a97d30ae904308b08acb3664c4688b1490ffdc3f4beeeaf79470a31b145b202b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102D5 5464 bytes
font_01_sfnt_off00011572.bin
fe5e9dd0caa7104cb7b5fa0dc177080cdfeaae7eaeb2c0857739282b22a85abe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11572 13116 bytes

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